10 Best Par Meter For Led Grow Lights – You Can Buy Right Now

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We found thousand of reviews when researching. We have considered users feedback on the Best Best Par Meter For Led Grow Lightsand Our suggestion includes only the finest of them in this articles.

10 Best Best Par Meter For Led Grow Lights

SaleTop pick. 1
Light Meter PAR Meter Up to 400,000lx and 6000umol/(㎡s) DLI Calculator Lux Meter PPFD Tester
  • Because the main spectra of LED | CMH, HPS and SUNLIGHT are different, human eyes and plants have different perception abilities for these light sources. FH-100 is specifically designed for different spectra to measure the most accurate LUX or PPFD.
  • When testing PPFD in a closed tent, you can close the tent completely and get the most accurate value by using our meter. While for other meters, you must open one side of the tent to do it, so the light will leak out and you can't get the most accurate value.
  • Save manpower. For example, to test the illuminance of the light source at different distances or different powers, with FH-100, only one person can complete it, instead of two people.
  • When testing, because you don't need to hold the light meter, you can avoid that the light is blocked by your body.
  • It can test the illuminance value in small spaces or places that cannot be touched by people.
Top pick. 2
PHOTOBIO LGBQM2 Advanced Quantum PAR Meter (Micromols)
  • All new for 2021, 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.
SaleTop pick. 3
Quantum PAR Meter - High Precision, Grow Light meter, Indoor Plants meter, Good for Growing droseras and All Indoor Plants,Rechargeable
126 Reviews
Quantum PAR Meter - High Precision, Grow Light meter, Indoor Plants meter, Good for Growing droseras and All Indoor Plants,Rechargeable
  • 【Quantum Par Meter】This fully portable handheld PAR meter features our highly accurate, integrated Quantum Sensor that measures PAR (Photosynthetically Active Radiation) flux in wavelengths ranging from 400 to 700 nm. It measures up to 10,000 μmol/s compared with 2,000 μmol/s for other meters on the market.
  • 【Save Money:】 Best selling AND useful for your indoor growing plants and 3.get you in the ball park of light requirements and testing for half the cost.
  • 【All Indoor plants】 Data logging capability using standard mini-USB cable and proprietary data logging software and Low power consumption with built-in low battery power indication.
  • 【High Precision】 Constant linear response curve (as opposed to other meters’ Gaussian response) yields higher accuracy independent of wavelength—perfect for measuring LED light output.
  • 【Rechargeable】【Free return/exchange/refund if any concern】【Charging 1-2 hours before use if no power】1year warranty. US patent.
Top pick. 4
Apogee Instruments MQ-500 Full-Spectrum Quantum PAR Meter & Telescopic Wand Bundle - Digital PPFD Meter for LED Greenhouse Grow Lights, Sunlight, & Plant Monitoring
  • FOR SCIENTISTS & SERIOUS GROWERS - Designed by world-renowned crop physiologist, Bruce Bugbee, PhD, the MQ-500 full-spectrum quantum meter is the premium tool of choice among leading scientists and growers for accurately measuring the photosynthetically active radiation (PAR) from all light sources. Package includes an AM-310 telescopic sensor wand that extends up to 33 inches for measuring hard-to-reach places and a neoprene carrying case.
  • MEASURING PAR IS CRITICAL - An accurate PAR meter is critical for measuring the intensity of light used in the precision growing of plants and other photosynthetic organisms in greenhouses, growth chambers, farms, gardens, aquariums, and additional agricultural systems.
  • QUALITY QUANTUM METER - Unlike cheaper LUX or footcandle sensors which are sometimes marketed as grow light meters, but are meant for measuring light for human vision, our meters feature a laboratory-grade PPFD (photosynthetic photon flux density), or “quantum,” optical detector precisely calibrated to measure the light intensity in µmol m-2 s-1 of the specific color wavelengths emitted by LEDs, HPS, MH, sunlight, and other light sources utilized by plants for photosynthesis.
  • EXTREMELY ACCURATE & STABLE - Precisely measures and combines the intensity of all photons between 400 and 700 nm to give a single PAR reading in µmol m-2 s-1 within 5 % uncertainty. Unlike hobby-grade PAR meters, our meter has a stable, accurate calibration with an accuracy drift rate of less than 2% per year.
  • RUGGED & EASY TO USE - Quantum sensor head is machined aluminum and potted solid with epoxy for years of use in harsh environments, including underwater. The handheld meter is attached by a cable and displays real-time readings, records samples, and logs average intensity and daily light integral (DLI) measurements. Unlike the sensor head, the handheld meter is not waterproof.
Top pick. 5
Hopoocolor Spectrometer Grow Light Tester Light Measurement PPFD PAR Extend Waterproof Sensor for Agriculture
  • 2 Years warranty. 5 inches LCD read data directly, Lightweight and convenience, also have software to output colorful gragh
  • With auto zeroing capabilities, you can be sure you'll always get a reading with pinpoint accuracy, integrating time 50us-10s, really fast!
  • Long focal length optical system, 2 nm optical resolution of Light Measurement Meter; High performance linear CCD sensor 3648 points; Wavelength: 350 to 800 nm
  • PPFD test range : more than 4000umol/m2/s. Waterproof sensor, length 1.0m or more(according to your demand, please contact us) Precise Measurement: LED, Natural Light, Sunlight..etc. Handheld and Portable. Application: Agriculture, greenhouse, planting, hydroponics
  • Bring Anywhere: From squeezing into tight places to keeping your load light, you can bring spectrometer wherever you need to. Fits easily into a work bag or large pocket and barely adds any weight. It's the ultimate in light-metering convenience!
Top pick. 6
SpotOn 400-700nm Quantum PAR Meter. Scientific Grade. DLI Mode Built in. Accurate for All Light Sources Including LED.
  • DLI Mode calculates average light over 24 hours
  • Scan Mode averages PAR over any area scanned
  • Spot mode takes instant PPFD readings
  • Extension Wand sold separately
  • Built-in stand/stake/magnetized screw hold meter to metal
Top pick. 7
400-700 nm Quantum PAR Light Meter with Built in DLI and Scan Mode Accurate for All Light Sources, Grow Light Meter, Indoor/Outdoor Plants Meter, Quantum Separate Sensor with Handheld Meter
  • This quantum PAR light meter is mainly used to measure the photosynthetically active radiation of natural light in the wavelength range of 400-700nm. Provides accurate PAR light readings from full sun to full shade indoors or outdoors and artificial light sources (LED, High Pressure Sodium, Metal Halide, Fluorescent, and Halogen). Widely used in agricultural meteorology, crop growth research.
  • The sensor uses a silicon photodetector and passes through a 400-700nm optical filter. PAR light measuring range from 0 to 4000 μmol/m2/s
  • Support three modes of operation: instant spot-check measurement mode for PAR light readings PPFD; scan mode for quickly averaging PAR over an area; DLI mode shows Daily Light Integral
  • Accurate and instant response. Easy to read large backlight display
  • The sensor of XAR-P10 PAR meter is waterproof and can be used in all weather conditions. (But the meter body is not waterproof). Only two buttons and easy to operate. Four AA Alkaline Batteries
Top pick. 8
Quantum Par Meter - High Precision, Rechargeable & Long Standby, Grow Light meter, Indoor Plants meter, Good for Growing droseras and All Indoor Plants…
  • 【Quantum Par Meter】This fully portable handheld PAR meter features our highly accurate, integrated Quantum Sensor that measures PAR (Photosynthetically Active Radiation) flux in wavelengths ranging from 400 to 700 nm. It measures up to 10,000 μmol/s compared with 2,000 μmol/s for other meters on the market.
  • 【Save Money:】 Best selling AND useful for your indoor growing plants and 3.get you in the ball park of light requirements and testing for half the cost.
  • 【All Indoor plants】 Data logging capability using standard mini-USB cable and proprietary data logging software and Low power consumption with built-in low battery power indication.
  • 【High Precision】 Constant linear response curve (as opposed to other meters’ Gaussian response) yields higher accuracy independent of wavelength—perfect for measuring LED light output.
  • 【Rechargeable】1year warranty
Top pick. 9
Digital Light Meters AP-8801C Light Meter for Plants Measure Light from 0.1~400,000 Lux with Extendable Light Detector up to 2m, Data Hold, Lux/FC Selection for Par Photography Plants
  • 🌻【Outstanding Performance】AP-8801C light meter measurement range up to 400,000Lux / 40,000FC. ±4%rdg+1.0%f.s (less than 10,000 Lux/1,000 FC) /±5%rdg+1.5% f.s (more than 10,000 Lux/1,000FC); Resolution:0.1Lux / 0.01Fc; Measurement speed: 2 times / second.
  • 🌻【Stretchable Light Detector up to 2 Meters】A removable light detector and the connecting wire that reaches 2 meters allow you to measure light at the best location for your convenience. The light detector comes with a lid to protect the light detector and keep it away from dust.
  • 🌻【High Brightness LCD & Low Consumption】AP-8801C lux meter adopts black & white high brightness LCD and large screen display. LCD display has low power consumption and easy to read data. LCD screen size: 28.6mm×51.3mm, character height: 13mm.
  • 🌻【Multifunctional Light Meter】Supports push the button to lock data, relative measurement mode, auto zero, Max/Min hold, auto/manual ranging, relative value, over-range reminder, low battery indication, data storage, environment temperature display, Lux/FC & ℃/℉units selection.
  • 🌻【100% Satisfied After-sale Service】Your purchase on AOPUTTRIVER is covered by two years product warranty. If you have any concern or problem, please feel free to contact us and we are always ready to help you out.
Top pick. 10
BTMETER BT-881E Digital Illuminance/Light Meter, Measure Lights 0.01~300,000 Lux (0.01~30,000 FC) Foot Candles, Par Meter Luxmeter for Plants Aquarium Light Tester
  • ☀【HIGH ACCURACY】+/- 4% readings +/- 0.5% f.s (10,000 Lux; 1,000 FC); +/- 5% readings +/- 10 digits (300,000 Lux; 30,000FC)
  • ☀【0.4 SECOND RESPONSE】2~3 times sampling per second, Instantly to measure out how much lights you’re getting
  • ☀【WIDE MEASURE RANGE】 This light meter can measure luminance at 0.01~300,000 Lumens, (0.01~30,000 Foot Candles), Which is much wider than the others. Resolution 0.01
  • ☀【EASY TO USE】The light sensor can be rotated 270º, so you don’t need to turn around the light meter to measure lights from different angles. Just rotate the sensor, and you can still read the measure at front
  • ☀【MEMORIZE THE LIGHT READINGS】This Lux Meter can help you record 33 sets of readings,Temp Testing, The RELATIVE measuring mode will show you the difference between current / recorded data. Ideal to use at home, garden, aquarium,plants, school, office, state, LED lights, indoor and outdoor

New Product

New
QSCVDEA Greenhouses Lights for Indoor Plants, Full Spectrum for Indoor Plants Suitable For Horticulture and Greenhouse Cultivation Supplementary Light for Nursery In Greenhouse 1100W
  • ❤Using high-grade LED light source. It has the advantages of super brightness, low heat and low power consumption. Can be used for gardening, family balcony nursery/seedling, greenhouse planting, etc.
  • ❤Environmental protection, low heat, low power consumption, high luminous efficiency, super brightness, service life of more than 50,000 hours. Its irradiation area is 1.5-2 square meters, so your plants will enjoy full lighting and grow very well.
  • ❤The adjustment function is suitable for the whole growth cycle of the plant. Without adjusting the position of the lamp, you can adjust the lamp intensity and spectrum requirements that are most suitable for plant growth, saving time and effort.
  • ❤You can hang growth lights on plants including metal hanging wires, which is very easy and convenient to use.
  • ❤Dual-chip (10W) LED, COB chip has strong brightness and works more efficiently. LED growth lights can make your plants grow quickly, greatly saving your time, scientifically designed to maintain the balance of par/lumen output and coverage.
SaleNew
Square 3 WiFi IOT LED Grow Light with WeatherEFX Plus SpotOn PAR Meter
  • Create an indoor garden to be envied, even by Mother Nature. In nature plants don't grow under full sunlight all day long. Or get woken up to sudden full daylight and then put to sleep with sudden darkness.
  • Experiment with how your plants respond to a break in the weather. Studies have shown that when plants sense shade or light levels changing, they strive harder to grow larger and reproduce.
  • Use our Cloud Intelligence phone App to set up cloud effects. Each minute can be programmed from just 20% light output up to 100% fooling plants into believing clouds will take away the sun. Watch them respond in kind with healthier growth patterns.
  • Use the SpotOn Quantum PAR meter to check photosynthetic light levels. Use the built-in DLI mode to measure average PAR over 24 hours.
  • Compare your weather programming to the places on earth where your crop grows best. Add or decrease light levels to perfectly and precisely match the place on earth you chose.
New
GRUOTVSZAK HPS 600 Watt E39 1150μmol Ultra PPF 20% to 40% PAR Increases Concentrate on RED Spectrum 90000 Lumens High Pressure Sodium Grow Light Bulb 2-Pack
  • 🌿【HIGH YIELD】🍃: 1150μmol/s industry high, give 10% more PPF to the grow. Yield greater. 90000 lumens superior brightness performance.
  • 🌼【BIGGER BUDS】🌻: At least 20%, up to 40% more PAR focus on RED to improve light utilization for photosynthesis designated for blooming bigger buds on flowering stage.
  • 🔗【Compatibility】⚙️: Compatible with electronic and magnetic ballast, E39 base.E-Ballasts with wide range of operating voltage (ballasts output voltage) 80V~280V are recommended.
  • 🔋【Long Life】⚡: Over 28,000 hours total life time, premium 90% output maintenance for 6000 hours efficient grow, quality guaranteed.
  • 💡【Warm Up Time】☀️: Allow 5 mins for full bright; Wait at least 7 mins before striking again after use.
New
Apogee Instruments SQ-420X Smart Quantum Sensor | USB Output
  • ORIGINAL SUNLIGHT USB QUANTUM SENSOR - Designed by world-renowned crop physiologist, Bruce Bugbee, PhD, the Apogee SQ-420X USB smart quantum sensor features Apogee's older and more economical photodetector that is excellent for measuring photosynthetically active radiation (PAR) accurately under sunlight, metal halide, and high-pressure sodium lights. For measuring other light sources, including LEDs, we recommend using our newer full-spectrum or ePAR sensors.
  • FOR SCIENTISTS & SERIOUS GROWERS - Unlike cheaper LUX or footcandle sensors which are sometimes marketed as grow light meters, but are meant for measuring light for human vision, our sensors feature a laboratory-grade photosynthetic photon flux density (PPFD) optical detector precisely calibrated to measure the light intensity in µmol m-2 s-1 of the specific color wavelengths emitted by sunlight, MH, and HPS lights that are used by plants for photosynthesis.
  • USB COMPATIBLE - Smart quantum sensor can be connected directly to a computer (Windows or macOS X) for taking spot measurements or graphing and datalogging real-time PPFD using the included ApogeeConnect software. The sensor can also act as a stand-alone PAR datalogger by simply connecting it to most standard 5 V DC USB power plugs.
  • ACCURATE & STABLE CALIBRATION - The sensor combines the intensity of all photons between 400 and 700 nm under sunlight, metal halide, and high pressure sodium lights to give a single PAR reading in µmol m-2 s-1 within 5 % uncertainty. Unlike hobby-grade PAR meters that are sometimes accurate out of the box, but then lose their calibration quickly, Apogee meters and sensors have an accurate and stable calibration with an industry-leading drift rate of less than 2% per year.
  • RUGGED & EASY TO USE - Quantum sensor head is machined aluminum and potted solid with epoxy for years of use in harsh environments, including underwater. Internal memory within the sensor head is capable of storing 10,000 user-specified periodic measurements that can be downloaded as a CSV file to a computer for analysis. For products with both a meter and a sensor, please see our other original X, full-spectrum, or ePAR meters.
New
Apogee Instruments MQ-210X Underwater Quantum Meter
  • ORIGINAL SUNLIGHT UNDERWATER QUANTUM METER - Designed by world-renowned crop physiologist, Bruce Bugbee, PhD, the Apogee MQ-210X "original" quantum meter features Apogee's older and more economical photodetector that is excellent for measuring photosynthetically active radiation (PAR) accurately under sunlight, metal halide, and high-pressure sodium lights. For measuring other light sources, including LEDs, we recommend using our newer full-spectrum or ePAR sensors.
  • MEASURING PAR IS CRITICAL - Measuring the PAR levels of your grow lights is one of the most critical measurements in the precision growing of plants and other photosynthetic organisms in greenhouses, growth chambers, farms, gardens, and aquariums. Our underwater original quantum meters are specifically designed to measure the intensity of sunlight, MH, and HPS lights underwater for biological, chemical, and physical processes in natural waters and aquariums.
  • UNDERWATER ACCURACY - Underwater PAR measurements can read low when a sensor is calibrated for air. This applies an immersion effect correction factor to get accurate measurements underwater by combining the intensity of all photons between 400-700 nm under sunlight, MH, and HPS lights to give a single PAR reading within 5 % uncertainty. Unlike hobby-grade PAR meters that may be accurate when new, but quickly lose calibration, our meters are stable with a drift rate of less than 2% per year.
  • FOR SCIENTISTS & SERIOUS GROWERS - Unlike cheaper LUX or footcandle sensors which are sometimes marketed as grow light meters, but are meant for measuring light for human vision, our meters feature a laboratory-grade photosynthetic photon flux density (PPFD) optical detector precisely calibrated to measure the light intensity in µmol m-2 s-1 of the specific color wavelengths emitted by sunlight, MH, and HPS lights that are used by plants for photosynthesis.
  • RUGGED & EASY TO USE - Quantum sensor head is machined aluminum and potted solid with epoxy for years of use in harsh environments, especially in saltwater or freshwater. The handheld meter is attached by a cable and displays real-time readings, records samples, and logs average intensity and daily light integral (DLI) measurements. Unlike the sensor head, the handheld meter is not waterproof.
New
MQ-200X Quantum Separate Sensor with Handheld Meter
  • ORIGINAL SUNLIGHT QUANTUM METER - Designed by world-renowned crop physiologist, Bruce Bugbee, PhD, the Apogee MQ-200X "original" quantum meter features Apogee's older and more economical photodetector that is excellent for measuring photosynthetically active radiation (PAR) accurately under sunlight, metal halide, and high-pressure sodium lights. For measuring other light sources, including LEDs, we recommend using our newer full-spectrum or ePAR sensors.
  • FOR SCIENTISTS & SERIOUS GROWERS - Unlike cheaper LUX or footcandle sensors which are sometimes marketed as grow light meters, but are meant for measuring light for human vision, our meters feature a laboratory-grade photosynthetic photon flux density (PPFD) optical detector precisely calibrated to measure the light intensity in µmol m-2 s-1 of the specific color wavelengths emitted by sunlight, MH, and HPS lights that are used by plants for photosynthesis.
  • ACCURATE & STABLE CALIBRATION - The meter combines the intensity of all photons between 400 and 700 nm under sunlight, metal halide, and high pressure sodium lights to give a single PAR reading in µmol m-2 s-1 within 5 % uncertainty. Unlike hobby-grade PAR meters that are sometimes accurate out of the box, but then lose their calibration quickly, Apogee meters have an accurate and stable calibration with an industry-leading drift rate of less than 2% per year.
  • RUGGED & EASY TO USE - Quantum sensor head is machined aluminum and potted solid with epoxy for years of use in harsh environments, including underwater. The handheld meter is attached by a cable and displays real-time readings, records samples, and logs average intensity and daily light integral (DLI) measurements. Unlike the sensor head, the handheld meter is not waterproof.
  • MEASURING PAR IS CRITICAL - Measuring the PAR levels of your grow lights is one of the most critical measurements in the precision growing of plants and other photosynthetic organisms in greenhouses, growth chambers, farms, gardens, and aquariums. Knowing the amount of PAR received affects decisions about all other growing parameters like water requirements, temperature, nutrient levels, CO2 levels, and more.
New
400-700 nm Quantum PAR Light Meter with Built in DLI and Scan Mode Accurate for All Light Sources, Grow Light Meter, Indoor/Outdoor Plants Meter, Quantum Separate Sensor with Handheld Meter
  • This quantum PAR light meter is mainly used to measure the photosynthetically active radiation of natural light in the wavelength range of 400-700nm. Provides accurate PAR light readings from full sun to full shade indoors or outdoors and artificial light sources (LED, High Pressure Sodium, Metal Halide, Fluorescent, and Halogen). Widely used in agricultural meteorology, crop growth research.
  • The sensor uses a silicon photodetector and passes through a 400-700nm optical filter. PAR light measuring range from 0 to 4000 μmol/m2/s
  • Support three modes of operation: instant spot-check measurement mode for PAR light readings PPFD; scan mode for quickly averaging PAR over an area; DLI mode shows Daily Light Integral
  • Accurate and instant response. Easy to read large backlight display
  • The sensor of XAR-P10 PAR meter is waterproof and can be used in all weather conditions. (But the meter body is not waterproof). Only two buttons and easy to operate. Four AA Alkaline Batteries
SaleNew
2022 VIPARSPECTRA Latest KS3000 LED Grow Light,300W with Samsung LM301H Osram Diodes 4 Bars Grow Light, 3x3ft Coverage Full Spectrum Dimmable Growing Lamp for Indoor Plants Seeding Veg and Flower
  • LOWER OPERATION COST & MAXIMUM YIELDS:VIPARSPECTRA KS3000 LED grow light adopts the market-leading Samsung LM301H Diodes(3.10 μmol/J) & OSRAM 660nm Diodes, higher energy efficiency LEDs increase yield of crops and save operation cost. KS3000 was designed for personal or commercial growers who want to optimize their grow space for the maximum crop yield while producing the highest quality crops.
  • OPTIMAL FULL-CYCLE SPECTRUM: Consists of 3000K warm white, 5000K white and 660nm deep red, which providing your plants with excellent spectrum, tailored for growing plants from germination, vegetative and flowering applications in indoor environments. The KS3000 delivers high light output and consistent uniformity with market leading efficacy, only consumes 300w perfect light for 3'x3′ coverage.
  • SUPERIOR HEAT DISSIPATION & EVEN PAR DISTRIBUTION: KS3000 grow light features a detachable power supply that can be mounted remotely on the side of a rack or on an adjacent wall to remove heat from your grow space. Large areas of solid aluminum heat sinks help you to achieve the ideal cooling system. Even intensity across your plants than other brands, which result in healthier, more balanced growth.
  • EASY INSTALLATION & FLEXIBLE DIMMER: Plug-and-play mounting system and field-replaceable parts allows for easy, low-cost maintenance. The built-in dimmer allows you to dial in the perfect PPFD for your plants at all stages of growth. For seedlings, we recommend 50% on the dimmer at a height of 24”. For vegetative growth, we recommend 75% on the dimmer at a height of 24”. For flowering, we recommend 100% on the dimmer at a height of 12”.
  • TRULY BEST BACK FOR THE BUCK: We provide 36-Month US Local warranty and 30-day money-back guarantee. Professional guidance, friendly customer service and US local after-sales service provides you with a pleasant shopping experience and helps your plants grow better. Make sure you purchase authentic VIPARSPECTRA grow lights. If you have any questions, please contact us at any time.
New
SpotOn PAR Meter and AROYA Solus Bundle - Measure PPFD, Water Content and Soil EC Nutrient Levels
  • Measure 400-700NM PPFD plus built in DLI mode, Scan Mode
  • Measure soil, rockwood, coco water content and electrical conductivity plus temperature
  • Lighting, watering and feeding are three of the most important measurements for plant growth
  • Learn how to crop steer using light, water and nutrients to maximize crop success
  • Save by purchasing both units at once. Brought to you by Forever Green Indoors in Seattle WA
New
Apogee Instruments DLI-400: Daily Light Integral Meter (Sunlight Only) Includes Apogee Instruments Protective Case
  • DLI-400 SUNLIGHT DLI METER: Gives research-grade measurements of PAR (PPFD), DLI and photoperiod in a low-cost model calibrated for measuring direct sunlight and some broadband grow-light sources only (MH, HPS). The meter takes spot measurements and records and displays daily light integral in mol·m-2·d-1 and photoperiod in 0.2 hours increments for up to 99 days. For accurate measurements under all light sources, including LEDs, please see our DLI-500 and DLI-600.
  • PAR/DLI/PHOTOPERIOD: Measuring and controlling the daily light integral (the total photosynthetic photons falling on a plant in a 24-hour period) and the hours of light a plant receives (photoperiod) is critical for optimizing plant health, triggering flowering, and inducing other plant morphology effects. PPFD, DLI, and photoperiod data can be viewed onscreen or downloaded via USB-C for analysis.
  • RUGGED AND READY TO USE: Built tough and rated IP65 to withstand harsh and wet environments. Unit can be placed directly on any level surface or mounted by attaching to commonly available camera tripods, clamps, or stakes using the standard camera-sized ¼-20 threaded port on the bottom. Protective case, meter, soil stake, AAA batteries, USB-C cable, screwdriver, and QuickStart guide are included.
  • BUILT FOR SCIENTISTS AND SERIOUS GROWERS: Developed for use by the Apogee Instruments’ engineering team under the direction of world-renowned crop physiologist, Bruce Bugbee, PhD. Calibration is NIST traceable to accurately measure combined intensity of photons between 400 and 700 nm to give a single sunlight PAR reading within 5 % uncertainty. Unlike hobby-grade PAR meters that drift out of calibration quickly, our meter has a stable drift rate of less than 2% per year.
  • MADE IN THE USA: All meters are designed, built, and calibrated at our headquarters in Logan, Utah, USA. Apogee Instruments has been creating research-grade instruments for scientists and serious growers for over 25 years. All meters are backed by our industry leading four-year warranty and supported by our world-class, US-based customer support team.

Best Par Meter For Led Grow Lights Buying Guide

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