SpotOn Quantum PAR Light Meter


The Quantum PAR Light Meter Features:

  • Provides accurate PAR light readings from ANY light source:
    • Full sun to full shade indoors or outdoors.
    • Artificial light sources (LED, High Pressure Sodium, Metal Halide, Florescent, Halogen…).
  • Three modes of operation:
    • Instant Spot Measurement mode for PAR light readings.
    • Scan mode for quickly averaging PAR over an area.
    • DLI mode shows Daily Light Integral on the LCD (no computer needed).
  • Water and impact resistant.
  • Compact and easy to use.
  • Integral mounting plate for: stand, stake, lanyard & hanger hole, and magnet mounts.
  • 1/4-20 threaded hole for mounting on camera tripods and stands.
  • Includes a sensor cover and soft carrying case.


An affordable meter that provides scientifically accurate photosynthetic active radiation (PAR) light readings under any light source including LED! This meter is designed for measuring PAR light indoors and outdoors regardless of light source type. It works well for greenhouse, field, and R&D applications requiring reliable plant growth light readings.

Additional information

Weight 0.17 lbs
Dimensions 5.75 × 1.75 × 0.85 in

+/- 5%

Daily Light Integral (DLI)

Calculated continuously from light readings every 3 minutes

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