PHOTOBIO Advanced Quantum PAR Meter

Measure Photosynthetic Light Output at the Canopy

Guessing at light intensity based on wattage or fixture spec sheets leaves a real gap between what a light claims to output and what's actually reaching the canopy after mounting height, age, and coverage angle are factored in. The PHOTOBIO Advanced Quantum PAR Meter measures photosynthetically active radiation directly at plant level, giving growers a real reading instead of a manufacturer estimate.

This handheld meter suits growers dialing in fixture height and spacing across a canopy, letting adjustments be based on measured PAR rather than assumptions carried over from a spec sheet.

Key Features & Benefits

• Direct PAR Measurement — reads photosynthetically active radiation at the point of measurement.
• Handheld Portability — check light levels at multiple canopy points without fixed sensors.
• Supports Fixture Placement Decisions — dial in mounting height and spacing based on measured data.
• Quantum Sensor Design — built specifically to read the light spectrum plants use for photosynthesis.

Who Should Use This PAR Meter

This meter fits growers who want to verify actual light intensity at the canopy rather than relying on a fixture's published spec sheet, particularly when dialing in mounting height and spacing across a grow space.

About PHOTOBIO

PHOTOBIO makes horticultural lighting and light-measurement equipment, including this quantum PAR meter, built to give growers a direct read on photosynthetically active radiation rather than an estimate based on fixture specifications.

Frequently Asked Questions

What does this meter measure?

It measures photosynthetically active radiation, the portion of light plants actually use for photosynthesis, directly at the point where the sensor is held. That's a more accurate picture of canopy light levels than a fixture's rated output alone.

Why is a direct PAR reading better than relying on a fixture's spec sheet?

A spec sheet reflects a fixture's rated output under standard test conditions, not what's actually reaching a specific canopy after accounting for mounting height, fixture age, and coverage angle. A handheld reading captures the real value at that exact spot.

How do I use this meter to adjust my lighting setup?

Hold the sensor at canopy height across different points in the grow space, then compare readings to identify uneven coverage or confirm mounting height and spacing are dialed in correctly. Adjustments to fixture position can then be based on measured data instead of assumptions.

Is this meter portable enough to check multiple locations?

Yes, it's a handheld unit built for spot-checking light levels at multiple canopy points rather than a single fixed sensor. That portability is what makes it useful for mapping coverage across a larger grow space.