Best light meter?

hyroot

Well-Known Member
You want to buy an apogee par meter. Home depot doesn't sell them. You do not want a lux or foot candle meter. Lux or lumens has nothing to do with plant growth. Lux meter shows how bright a light is for human eyes. Par meters measure the amount of photons (umole/s). The sun at midday is 2000 umole/s on the surface of the ground. Your average 1000w hps is about 1500 umole/s at 12 inches away.

http://www.apogeeinstruments.com/mq-200-quantum-separate-sensor-with-handheld-meter/
 
Top