The PAR meter is a device used to measure the Photosynthetically Active Radiation (PAR) emitted by a grow light. The PAR meter is used to determine the optimal light intensity and wavelength for plant growth.
20 Best Par Meter For Led Grow Lights
1. PHOTOBIO Advanced Quantum par Meter
Compact, portable meter with highly accurate remote quantum sensor
Simple and easy to use operation, with storage of up to 99 readings
Ideal for grow tent, greenhouse and commercial grow applications
All new for 2020, the Advanced Quantum PAR Meter provides accurate and cost-effective measurement for all light sources used to grow plants. The PHOTOBIO by Phantom Quantum PAR meter is designed to measure PAR (Photosynthetically Active Radiation) flux in wavelengths ranging from 400 to 700nm.
The Advanced light meter comes complete with a remote sensor, two connection cables, the main unit and easy to replace AAA batteries. The PAR meter can store up to 99 measurements for easy reference.
Portable PAR meter with highly accurate remote quantum sensor Measures photosynthetically active radiation (PAR) from 400 to 700 nm Simple and easy to use Record up to 99 readings Includes short coiled and long straight connection cables There is a proportional relationship between the number of photons absorbed in 400 to 700nm band and the rate of photosynthesis in plants, which is important for horticultural studies and monitoring plant physiology.
The meter is fully cosine corrected for the angular incidence of light, meaning that if you are not holding the sensor perfectly perpendicular to the light source, the sensor will still read the light correctly.
The Hydrofarm Digital Light Meter sensor is stable and made of a long life silicon photo diode. Dimension: 5. 7″ x 3. 3″ x 2. 1″.
This is a decent cart for the price. There is a device on the in-coming water supply that will disengage the connection if the hose connection becomes too taught or if the water pressure is too high.
It’s very sensitive, so I’ve been drenched by this twice while rewinding the hose in the first few weeks I’ve owned it. The hose connection is quite short, so I may have to add on some length to it. The handle has a release on it that allows it to fold into the base.
It doesn’t go all the way in, so I’m not sure that’s useful at all. I don’t need it to fold away, so that’s not a big deal to me. The wheels on the cart are small and there is very little clearance above the ground, so this cart will not travel well over any grass or garden surface.
It’ll work fine on a driveway or sidewalk. Consider what you need the cart to do before buying this one.
My first Suncast Mobile Hose Reel Cart is this still going strong after three years. I leave it outside all summer, put it away after the first heavy frost. That cycle starts again in the spring. I haven’t had a single problem and I don’t have any complaints and today I purchased my second Suncast Mobile Hose Reel Cart and a 50 foot length of rubber hose capable of handling very hot water.
I’ll add another 50 foot length of rubber hose if need be. Going from the patio next to the house down to the berry patch or out to the garden was just getting to be a little much for this senior citizen.
I intend to use my new purchase almost exclusively for the patio area, this way I’ll be able to leave the one that’s three years old Down in the berry patch and garden area.
A legacy of accuracy pocket-sized and exceptionally accurate, the Flashmate L-308X-U light meter from Sekonic is a compact tool for metering both ambient and flash lighting as well as working in video with dedicated Cine and HD Cine modes.
Equipped with a sliding lumisphere, the L-308X-U is able to measure ambient light as well as reflected light via a lens with a 40° reception angle. This meter also has a wide metering range; from 0 to 19.
This light, simple light meter is usually with me. Outdoors I set fixed values and get results that show colours as seen and realistic reflections. With the Lumidisc it gives me a handy guide to proportions of light sources.
The meter is not an essential tool for me but it complements the camera’s reflective reading. I bought an earlier model almost twenty years ago. When that one was stolen I ordered another; it no longer comes with the Lumidisc so I bought that as well.
Extech LT300 Light Meter, battery, 1. 57″W Light meter measures up to 20,000 ft candles or lux with 0. 01 resolution. Come complete with remote sensor, sensor cap, protective holster and 9v battery. Features: Peak mode captures min/max light pulses as fast as 10s Measurements are displayed on a 4000 count LCD with analog bar graphRemote light sensor is on a 12 In.
(305 mm) coiled cable that expands to 24″ (609 mm).
Large LCD with advanced functions and features EasyView light meter measures up to 999,900 lux in five ranges and up to 99,900 footcandles in five ranges. Meter utilizes a precision silicon photodiode sensor to obtain readings which are displayed numerically on a large LCD screen.
Unit features luminous intensity (candela) calculations, and has storage and recall of up to 50 measurements and includes relative or real-time stamp. Color and cosine corrected to CNS 5119 Class II standard.
built-in stand, protective holster, six AAA batteries, and carrying case.
After using many other cheap and uncalibrated light meters for a long time, I was through with the build quality and inconsistent readings between different meters. Finally decided to go with the Extech EA30-NIST and the first thing I noticed was the build quality.
Needless to say, you get what you pay for–not to mention how far off some of my other uncalibrated meters were. Haven’t had to stretch it out to 400,000 Lux yet but resolution allowed me to get consistent readings in a dim candle lit room.
Rather than just seeing a bunch of numbers jumping around, the bargraph is also very useful in “visualizing” small changes in light in real-time. My only gripe (if you could even call it that) is with the sensor cover which falls off quite easily.
Be sure to secure the cover to the sensor housing via the provided attachment points or you could be looking for that cover for a long time. Overall, this is an excellent meter with useful features not offered on other cheaper meters–happy with the results.
Arrived quick and provided with excellent customer service by TE Equipment!.
We needed the light meter to meet policy standards for our agency’s office lighting. The light meter gave us accurate results and was easy to use. We found that our office was not just meeting the standard, but was operating above standards.
The classic photo meter tracing its roots to the famous Norwood Director, the Sekonic L-398A has become a favorite with cinematographers the world over. A pure analog experience, the meter needle and exposure dial system gives you all reading combinations at a single glance.
And because it uses an amorphous photocell that generates its own power, there is no need for a battery. Incident measurements can be taken with the over 180-degree Lumisphere for general readings of three-dimensional objects, or with the Lumidisc selective area readings, measuring the lighting ratios between highlights and shadow areas or light falling on flat-field objects such as artwork, measurements outdoors or under bright studio lights.
The Sekonic L-398A’s swivel head allows you to hold down the metering button and “walk the set”to check light levels. Release the button, and the needle locks down the meter’s analog display needle for easy-to-read exposure calculations.
Exposures are displayed for both still and cine applications. For reflected readings, a flat Lumigrid replaces the Lumisphere. If you plan on shooting with a fixed ISO and shutter speed, an optional Slide Set (Direct Reading Slides) makes it easier to take readings in fast-paced shooting scenarios.
The Sekonic L-398A Studio Deluxe III makes an ideal prime or back-up meter for still or motion picture shooters.
Nurture your plants with light from all angles. The AeroGarden 45W LED Grow Light Panel is a grow light that can be used in a wide variety of settings – this versatile light can be hung from above or tilted on its stand (hanging kit and stand included).
It also rotates 360 degrees! The panel can be used for all stages of plant growth, from seed starting to flowering to harvest. The stand is sized perfectly to hold a seed starting tray. As your plants grow, the stand’s legs adjust to raise the light up.
This grow light contains white, blue, and red LED lights – white spurs fast growth, blue generates bigger yields, and red promotes flower growth. Plus, there is no harsh purple glare. The AeroGarden 45W LED Grow Light Panel is compatible with most grow mediums, including soil, hydroponics, and aquaponics.
With a 30,000 hour rating, this light can save hundreds of dollars in energy and replacement costs over its lifespan.
Voltage Test Range: Dc 6. 5~100v; Current Test Range: 0~100astore Energy Data When Power Off(can Be Reset To 0). The Blue Backlight Can Be Turned On/off Manuallywith Overload Alarm Function(if Active Power Is Larger Than Threshold, Backlight And Power Will Flash)large-screen Lcd (display Voltage, Current, Active Power, Energy At The Same Time)note: Only Display And Shunt Are Included.
It Doesn’t Include Any Wire Or Accessories Main Specifications: Working Voltage: Dc 6. 5 ~ 100v Measuring Accuracy: 1% Power Consumption: 0. 2w Measurement Speed: 2 Times/s Store Energy Data When Power Off.
Can Be Reset To 0. The Blue Backlight Can Be Turned On/off Manually Test Range And Display Format: 1. active Power Test Range: 0~10kw 2. energy Test Range: 0~9999kwh 3. voltage Test Range: Dc 6. 5~100v 4.
current Test Range: 0~ 100a Precautions 1. This Module Is Only Suitable For 6. 5~100v Dc Power. 2. Applied Load Should Not Exceed The Rated Power. 3. Wiring Order Cannot Be Wrong. 4. This Module Is Suitable For Indoor, Please Do Not Use Outdoor.
Packing Including: 1x Dc 6. 5-100v 100a Power Multimeter.
All of the features work. Used in a school bus converted to a camper. Nice for monitoring house battery. The gadget uses a tiny amount of power itself. So, I’m going to add master switch for periods that the vehicle is not in use.
The gauge snaps into a rectangular opening, something you’ll have to create for a nice looking installation. The shunt is even more of a challenge. It’s on the ground side. It has to be insulated from the vehicle chassis.
Every metal part of a bus is grounded. It took a good deal of thought, time, and effort to make a make a sturdy, insulated mount for the shunt. I made one out of Delron plastic. A mass produced, plastic holder would have been real welcome.
I liked this item so much I bought two. It was exactly as described with the online wiring diagrams being a great help. One was mounted in my electrical panel in my camper van and the other was placed in a small project box to serve as a line voltage monitor for mobile ham radio usage.
The Gavita Pro 1700e LED fixture operates at 645 watts with an output of 1700 μmol s-1 PAR and an impressive efficacy of 2. 6 μmol s-1 per watt. The Pro 1700e delivers broad, intense light coverage with its 8 passively cooled LED bars allowing you to use it in low rooms, vertical racks, over benches, or even in tents.
I upgraded from two 200w Black Dog LED, which, for one or two plants are ok. This light is a beast. It fills my space with a god-like whiteness thats unlike anything I’ve witnessed thus far. If the advertisements are right, it will pay for itself in one grow.
I was forced to AC the space after installation. In an 8x 6’ by 6’ high space, my temps rocketed to just under a hundred. Also had to add humidification as this light dries out the universe. No regrets, yet.
That would be the only reason for four stars. Once the plants got used to that incredible intensity, they have perked up and look phenom and happy. I like the idea that one fixture can do an easy 8-10 (maybe more?) plants.
One thing i noted with the Black Dog fixtures was the prevalence of “purple” tones, this light is pure white as the driven snow. Like ya got an angel hanging out in your garden.
Absolutely love the light. It was recommended by a master grower I grew up with, I just got back into growing after a 5yr vacation. Plants love the light and responded well to full power when not having been subjected to that intense.
I hung the light 5ft up as it is was really intense for my girls. 2 days later growth that was substantial. Left it at 5 for flower and yessir im getting the controller to dim and run my whole op with this.
Super impressed! However to be honest i was very disappointed by having to buy my power cords. I thought i read there was a 6ft cord included. Im not a good reader but i thought i read that ppl were disappointed in the 6ft cord that came with it and had to upgrade to the 8ft.
We couldn’t be more pleased with our purchases from you guys. Excellent customer service, and excellent deals from this company. I am so impressed with the deals they can swing, and even more impressed with their follow through with every step of the process.
Super fast shipping and great people to work with. Will absolutely purchase products from them again whenever I need anything grow related. Buy from these guys ! Special thanks to Zevy for reaching out and letting me know about current promotions they have going on.
Sekonic Litemaster Pro L-478D-U Light Meter Equipped with a large and intuitive 2. 7″ color touchscreen LCD. The major ability of this system enables complete control of the flash’s power in 0. 1-step increments.
Notable for the L-478 light meter series is the large color touchscreen, which allows for fast control over settings for both ambient and flash metering. The meter is quite capable as well, able to function within a range of -2 to 22.
9 EV at ISO 100. Additionally, for the current crop of hybrid shooters this model expands on its standard stills functions with two distinct video modes: Cine and HD Cine. These settings give access to frame rate selection from 1-1,000 fps as well as shutter angle settings from 1-358° as well as ISO 850 for Canon cinema cameras.
I no longer have 20/20 perfect vision, so the large, bright smart phone style screen of the L-478 is a great upgrade from my old Sekonic L-358 meter. The L-358 is very popular with Pros (and for good reason – & the newL478 does not do much more in terms of function) but recently I’ve found myself peering hard at the tiny ISO numbers on the 358’s old fashioned small LCD screen and reaching for stronger reading spectacles.
I decided that, since you can now get used L-478 meters at reasonable prices, it was time to upgrade. I’ve only had the new (used) L-478 for a few days but it’s everything I hoped for: the display is much easier read, and it has better ease of use than the old L-358 (and it delivers accurate exposures) – so IT’S A KEEPER.
I came to this meter from a Sekonic L-358 with pocket wizard chip. I was attracted to this meter because I would be able to remotely control the power of my Paul C. Buff Einstein remotely saving my trips up and down a ladder when the light was mounted up high.
That is the only thing I like about this meter. The touch screen is awful. Doesn’t respond when you want it to and is too sensitive to random screen touches. You must always check the meter to make sure that you haven’t accidentally touched the screen and changed the ISO or shutter speed.
I also have found there are a lot of dead spots when the meter just won’t trigger the light from the desired location. If i move the meter to the right or left 6 inches then it works. That is not acceptable.
I would rather have my L-358 with pocket wizard chip back and deal with manually controlling the lights. The L-358 worked every time.
I’ve been using a Sekonic L-518 for over twenty years and that is my comparison reference for the L-478. What’s immediately noticed as missing from the L-478 is the ability to take reflectIve light readings without the optional spot attachment.
The L-518 allows the sphere to be removed and replaced with a clear glass disc over the light receptor to take reflective readings. This is not a major omission because the cameras I use have very effective reflective light meters and at worse it’s only a possible inconvenience.
Other than that, the L-478 is smaller, lighter, easier to use and just as accurate as the L-518. The other complaints are the touch screen – if practical, a capacitive touch screen rather than resistive touch screen would make use easier.
The main difficiency is the carrying case. It is inadequate in every way. The optional case should be the one included with purchase. Other than those minor points – the L-478 is a fine piece of equipment.
Digisix 2 light meter. Digital lcd readout. Analog scales. Reflective or incident modes. Contrast scene readout. Clock with timer and alarm. Contrast measurement. Ambient temperature measurement. Tripod socket.
I have been using mine with medium format film cameras for almost a year. It goes with me on hikes all the time. Incident readings are absolutely fantastic for spot-on exposures. Reflected mode is a bit more challenging to use because you do not have a precise way of knowing what part of a scene the meter sees, but simply pointing it at a shadow will produce decent results.
I have tested this meter against a 18% grey card and compared its readings to other in-camera meters that I have, they’re all within 1/3 stop of each other. I love the fact that this meter does not have an on/off switch and the last reading is visible forever.
This makes it much faster to use. It is incredibly lightweight and you won’t feel it if wearing as a necklace. Not everything is perfect though. There are two things I dislike about this meter. First, the ISO changing is a nightmare via dreaded press and hold, then wait for a beep, then press, press, press.
press ugh!. The second problem is that the buttons are not recessed into the body and they’re constantly get pressed accidentally when a meter is in the bag. I know this because every time I pull it out it’s reading not enough light i.
e. it’s been constantly pressing against something in the darkness. For that reason the battery gets drained quickly.
I like the Gossen Digisix 2 light meter. I use it with an old film camera to double check the exposure readings. It measures either reflected light or incident light. It does not measure light from flash exposures.
The plastic feel to it seems cheap. However, I have not had a single problem with it.
Sekonic’s new LITEMASTER PRO L-478D meter is the world’s first touch-screen-operated light meter. It has an array of unique, must-have features for both motion and still story tellers. Its compact size is both instantly familiar and comfortable to use.
The large LCD (2. 7″) displays ambient, flash, cine and a host of other information in a clear and understandable way. Settings are made by simply touching or sliding a finger over the screen. The L-478D can be quickly calibrated to your camera using Sekonic’s Data Transfer software and either Sekonic or X-Rite Brand targets or by manually inputting data to the DTS program or on the meter itself.
Good light meter, but the the readings I get from it are so close to what my Canon pro camera is telling me I have to question, is this a gadget too far. yes, it think so. I should qualify this by saying I am not a studio photographer who may see more benefit than I.
However, that said It has proved useful when combining flash with ambient light, though this is such a minimal amount of my photography. I tend to go with my experience and the difference is just minimal.
Sorry Sekonic. Anyone want to buy a nearly new light meter?.
The Sekonic L-208 TwinMate is a palm-sized analog light meter for hand-held incident and reflected ambient light readings. It can also be mounted onto a camera or bracket using the included hot-shoe adapter for quick, camera-positioned reference readings.
Though designed primarily for entry-level users, long-time shooters look to the Sekonic L-208 TwinMate as an accurate, easy-to-stow, back-up meter. Owners of rangefinder cameras who desire an incident and reflected meter also appreciate the included shoe mount.
The lumisphere enables accurate incident readings. Retract the lumisphere to take reflective readings. A hold-and-read function maintains readings for 15 seconds after releasing the measurement button to allow time to evaluate settings.
The L-208 is powered by a single, long-lasting CR2032 lithium battery.
The meter seemed fine until today. This is only about the third time I’ve used it. I was out shooting and it just stopped. I assumed it was the battery, but I just tried three different new Duracells and I still get no response.
I know Sekonic meters used to be reliable, but apparently those days are gone.
Best led grow light for Beginner and expert growers. High-efficiency white light quantum boards led grow lights with Samsung LM301B diodes Ideal for Veg & Flower Cycles High-efficiency Mean Well driver Spider farmer SF2000 LED Grow light Designed for worldwide growers.
SF2000 made in China, I’m not impressed. The other lights that look like it. I’m sure are just as good. My 2 star review reflects only from my ownership of high quality reef aquarium lights. The technology spider farmer puts in to these lights is next to nothing.
I feel like if I handle this thing regularly it will break. The stupid hoist string idea just seems dumb so much extra string what the heck do I do with the rat nest?the power cord is thicker than one of my dewalt drills.
I order the sf2000 kit over a week ago and I’m still waiting. spider farmer still hasn’t processed my order and still hasn’t shipped it. I was extremely excited for this product as it’s my first grow.
The product looked good and the company had strong reviews. But not everything is as it seems. Like I said still haven’t got it. I will be looking to cancel my order and going with another company. Hopefully y’all have better experience then me.
But for me its 0 stars cause I never got the product. Spider farmer please fix your customer service. And shipping problems. Thanks.
I purchased a SF 4000 on Oct. 20th and my light was delivered on Oct. 26th. Oct. 27th UPS delivered a second light. To my surprise after checking credit card statement, I was charged for another light the day after my purchase.
This is very unsettling that this could happen with this Company’s Website and their ability to protect customers payment info. 24hrs or so after contacting the company to make them aware as to what’s going on, they say I have to pay shipping costs to return because there is no defect in the light itself.
I did not order this light a second time, but I have to pay to ship it back or be out the $500 for this light I do not need nor have no room for. Website will not communicate back with me about giving me a return address for this light and issue a refund to fix this problem.
I’ll never use this company again and would advise others to use at their own risk. So the free shipping I recieved on my original order, now looks negated after having to pay shipping fees to send back a light I did not order twice.
🤦♂️ I should have just used Mars Hydro again. Their customer service is on point and very helpful. Trying to save a Buck $ has now cost me more. Plus this is a China owned company. Even more unsettling about how loose they obviously are with customers payment info.
And the first light that was delivered, had 3 loose screws in the box. After inspecting the ballasts I notice the 3 small screws were not even screwed in during assembly. They were just thrown loosely down in the box.
I did install them where they should have been installed before delivery. And there was no ratcheting ropes with hardware to hang the light. I had to go to Lowe’s and buy 2! 🤦♂️ I do not recommend this company to anyone.
The Active Air 2 Way Moisture and p H Meter is a sensor that monitors your plant’s moisture and p H so you know when to water it and balance its p H. Not watering your plant enough puts it at risk of dying, but so does over watering it.
That’s why Hydrofarm created a product that helps you keep your plant’s moisture at the right level. The moisture readings register on a scale of 0 (dry) to 10 (moist). The p H readings are shown to be between 0 (acidic) and 10 (basic).
It can be used for your indoor or outdoor plants. Monitor your plant’s water and p H levels to keep it growing and healthy with the Active Air 2 Way Moisture and p H Meter.
I have lome soil and moisture is always in question. The meter seems to work, but I wonder about the the accuracy. The meter displayed either very wet or dry, but not mid-scale. Also, I had to be careful when inserting it into soil as the rod are not that strong.
The double stem on the Meter is hazardous to small plant roots. One stem is slender–it’s all right. The other is much fatter, and definitely difficult to work into the potted plant without damaging the tender roots.
The Super Ultrathin Blue Red LED Grow Light Panel is perfect for your plants and aquarium to promote better growth. 100% of the power input for our LED grow lights is used for higher chlorophyll and organic material production.
(1). Much brighter and more durable. (2). High-efficient and energy-saving design. (3). Recommended Coverage: One panel per 21. 5 to 32. 3 square feet. (4). Hanging kit included, easy set up in minutes.
These are simply bright lights that give the plants exactly what they need – LIGHT. The versatility of these lights are endless and they last for years. Running some of these for over 3 years, 12 hours a day and still working flawlesly.
I have several flat against a wall, to give light to hanging plants; I have others under cabinets, some in greenhouses, some hanging above plants, some to enhance terrarium light. The thinness of the panel makes them extremely versatile.
I’ve been ordering these flat panels from apluschoice for several years and while the price has increased slightly, I still find these lights to beat out the fancy so-called grow lights, with dimmers, fans and other unnecessary gadgets.
I have over 300 plants in my house and yes, I use other lights as well, but these panels are my favorite and judging from plant growth, my plants are happy with them too. Don’t get roped in by “gadgets” on grow lights – get something that actually works, like these panels.
Giving 3 stars for now as I just received the unit and already am not impressed. THE GOOD: -The light is very bright and my plants appear black under it, so I hope it will help my plants grow in the next few months, only time will tell).
-It lights about a 16″x16″ very well and less so further out. -Very simple. No buttons or control. THE BAD: -The light is VERY thin, so much so, that it was warped before or during shipping. This doesn’t affect its ability to turn on and off, but was difficult to hang with the weird warping.
-No hanging kit, clips or any other accessories included. Disappointing as I thought a mounting kit was included (I used fishing line and a ceiling hook I had on hand) -No power switch so you must unplug to turn off (which is only a pain because of where I have my plants set up).
-Very simple. No buttons or control. (I listed this as both a pro and con as some may like the simplicity).
It is extremely thin. Be careful with it. I was surprised my how blindingly bright they are! I got 2 of them to use in a 4×2 foot area. It works great for starting seeds and uses much less electricity than my fluorescents, which was my main reason for buying it.
I have used it for starting peppers, tomatoes, flowers, herbs, etc. Has worked fine. Although it is good for seed starting I would advise using something more powerful for mature plants. I put it ~12″ from the tops of my plants but produces very little heat so you can safely put it closer.
Would be also good for supplementing other grow lights. I may buy more for next year’s seed starting. Good light for the price.
17. Volt 720W FL-1 Full Cycle Commercial LED Grow Light (120V with 240V Wire Whip)
The highest output LED grow light on the market, with 2000 μmol/s PPF and 2. 8 μmol/J efficacy. At 720W, it has is a higher light output than 1000W DE HPS Lamp and uses 28% less energy. This full-cycle commercial LED grow light utilizes Samsung and OSRAM LEDs to produce full spectrum white light.
Full spectrum light mimics the spectrum of the sun, which is optimal for maximizing crop yield and quality. Includes a built-in dimming control knob with remote dimming capability, mounting hardware with height adjustment, and a 240V wire whip.
Passively cooled by its ladder design. The low heat output allows it to be placed as close as 6 inches from canopy without damaging plants. The recommended mounting height is 6-12 inches from the canopy.
At 720W, its 2000 μmol/s light output matches or exceeds that of traditional 1000W DE HPS grow lights, and its low profile allows it to be used in vertical grow configurations. This grow light is passively cooled by its ladder design, and due to its low heat output, it can be placed 6 inches from the canopy without damaging plants.
It comes with a built-in dimming control knob and has remote dimming capability. Includes mounting hardware with height adjustment, along with a 240V wire whip.
IšverstiShow in original languageThe only complaint that I would have at this point is the false advertising that they would be shipped discretely. They were not. If there are those worried about this you probably should order elsewhere.
They did come packaged safely and there did not appear to be any damage. Got them installed with no problems. So far the product is functioning as it should. They are definitely very bright. As far as long term function will have to see.
IšverstiShow in original languageI’m an amateur grower but have been getting more serious and wanted to invest in a high-quality light. I ordered 1 FL-1 for a home grow with 6 plants in a 4×4 tent. This was the highest output light I’ve used so far and I could definitely tell the difference when my plants started to bloom.
I got the highest yield I’ve gotten so far and had no issues along the way. Hung the light about 6-8 in from canopy as directed and was afraid of the plants burning, but never happened. The dimming knob was also great so I could use the same super powerful light for veg too.
Would recommend to friends or anyone looking at this light.
UV-C Light Meter Includes: Protective hard foam lined carrying case UV probe Tripod screw Magnetic mount 9V battery Features: Measure damaging UV (ultraviolet) light in the environment and museums. UV degradation studies in the pharmaceutical, cosmetic, semiconductor, printing, window tinting, and other industries.
Laboratory chromatography, electrophoresis and forensics. Test UV sterilization and dermatology lamps in hospitals. UV light intensity appears on the large backlit display in either μW or mW/cm² while the small lower display simultaneously shows minimum, maximum, average and recorded data.
Up to 20 data points can be recorded automatically at a variety of intervals. Features zero point reset, hold, and indicates when the battery is low. Model 850010 measures short wave UV-C light for applications such as UV light fume hoods, UV sterilization, industrial glass and non-destructive testing.
Seems to work well, I guess the ozone layer isdisintegrating because I pretty much always get a UVC reading on the ground from the sun in NYC. Stay out of the sun. Sorry. Test for yourself and know the truth.
The Extech EA31 light metre is a rugged and compact light metre which measures up to 20,000Fc in 4 ranges or 20,000Lux in 4 ranges. The easy-to-use Extech EA31 light metre features a large display with data hold, out of range indication, low battery indication, minimum and maximum readings, auto power off, and zero functions.
The Extech EA31 light metre utilises a precision silicon photodiode sensor attached with a 0. 9m coiled cable as well as cosine and colour corrected measurements to maintain an accuracy of 3% of reading.
A Extech EA31 light metre has high resolution which provides accurate use in low light conditions.
Wide Range Light Meter that provides high intensity light measurements up to 40,000Fc/400,000Lux. This product is NIST Certified which indicates that the product is traceable to standards provided by the National Institute of Standards and Technology (NIST).
The par meter for led grow lights is a great tool for any indoor gardener. It can help you determine how much light your plants are receiving, and how much they need. The par meter can also help you find the right balance of light and darkness for your plants, so they can grow healthy and strong.
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