Accurate and Affordable Quantum PAR Light Meter for All Grow Lights

Improve your indoor or outdoor garden by accurately measuring the Photosynthetically Active Radiation (PAR) levels of your grow lights with the Quantum PAR Light Meter. This easy-to-use and versatile meter is perfect for gardeners using various light sources, such as LED, HID, HPS, MH, and many more.

Features and Benefits

  • Wide compatibility: Provides accurate PAR light readings for any light source, including LED, High Pressure Sodium, Metal Halide, Fluorescent, and Halogen lights.
  • Indoor or outdoor use: Works effectively in full sun to full shade conditions, making it suitable for both indoor and outdoor gardens.
  • Compact and user-friendly: Designed with an ergonomic layout and simple controls, making it easy and comfortable to use.
  • Water and impact resistant: Built to withstand rough handling, accidental drops, and water exposure, ensuring durability and reliability.
  • Versatile mounting options: Features an integral mounting plate, a 1/4-20 threaded hole for camera tripods, and stand, stake, lanyard, hanger hole, and magnet mounts for convenient setup and use.

How to Use

  1. Choose a suitable mounting option and set up the Quantum PAR Light Meter in your desired location.
  2. Select your preferred mode of operation.
  3. For Instant Spot Measurement mode, point the meter at your light source and read the PAR levels on the LCD display.
  4. For Scan mode, move the meter over the desired area, and the device will average the PAR readings automatically.
  5. For Daily Light Integral (DLI) mode, monitor the accumulated amount of PAR on the LCD display without the need for a computer.
  6. Use the captured PAR data to adjust your grow light settings and improve your garden's overall health and productivity.

Aqua Gardening Suggests These are Best For

The Quantum PAR Light Meter is ideal for indoor and outdoor gardeners, horticulturists, and growers who want precise and reliable PAR readings to improve their plants' growing conditions. By understanding the PAR levels in your garden, you can make informed adjustments to your lighting settings and optimize your plants' growth and yield.

Quantum PAR Light Meter Specs

0.0 to 6,500 ?mol m-2 s-1DLI (Daily Light Integral):
0.0 to 560.0 moles m-2 day-1C
Display Resolution: PAR Light:
0.1 ?mol m-2 s-1 from 0.0 to 99.9
1 ?mol m-2 s-1 from 100 to 6,500DLI:
0.1 moles m-2 day-1
Accuracy: +/- 5% (each meter is calibrated to a NIST traceable light sensor on a broad-spectrum light source)
Azimuth Error: +/- 1% over 360°
Daily Light Integral (DLI): Calculated continuously from light readings every 3 minutes
Water Resistant: IP-65 rated for use in rain, irrigation, and condensing environments (do not submerge)
Operating Environment: 32-130°F(0-55°C) with 0-100% RH condensing ok
Battery: CR2032 3v coin cell lithium included (2-year battery life)
Size & Weight: 1.75in(4.5cm)W x 5.75in(14.6cm)L x .85in(1.8cm)D
Response Data:

Spectral Response

Cosine Response


What is the Quantum PAR Light Meter used for?

The Quantum PAR Light Meter is an affordable tool designed to provide accurate measurements of Photosynthetically Active Radiation (PAR) levels under various light sources, including LED, High Pressure Sodium, Metal Halide, Fluorescent, Halogen, and natural sunlight. It is beneficial for determining optimal light conditions for plant growth both indoors and outdoors.

How many modes of operation does the Quantum PAR Light Meter have?

The Quantum PAR Light Meter features three modes of operation: Instant Spot Measurement mode for immediate PAR light readings, Scan mode for rapidly averaging PAR levels over an area, and DLI (Daily Light Integral) mode, which displays DLI on the LCD without requiring a computer connection.

Is the Quantum PAR Light Meter water and impact resistant?

Yes, the Quantum PAR Light Meter is designed to be both water and impact resistant, making it suitable and durable for various indoor and outdoor environments.

What mounting options are available for the Quantum PAR Light Meter?

The Quantum PAR Light Meter comes with an integral mounting plate accommodating several mounting options, including Stand, Stake, Lanyard & Hanger Hole, and Magnet Mounts. It also features a 1/4-20 threaded hole for mounting on camera tripods and stands.

Does this meter come with a protective case?

Yes, the Quantum PAR Light Meter includes a Sensor Cover to protect the meter when not in use and a Soft Carrying Case for convenient transport and storage.

Can the Quantum PAR Light Meter be used outdoors, even in full sun or full shade?

Yes, the Quantum PAR Light Meter is designed to accurately measure PAR light levels in various lighting conditions, including full sun and full shade outdoors. It is also effective at measuring PAR levels from artificial light sources indoors.

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(SKU: 131534)

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