APOGEE LIGHT METERS:
The BEST ePAR / PPFD / PPF LIGHT METER - Quantum Flux Reader APOGEE is the best Company in the World - MADE IN THE USA
Perfect for measuring light distances of Cannabis plants and other plant as well. LED Grow Lights the MQ-610 ePAR 2021
version is the Best they have created to measure from UV to Far Red. Including measuring of purple type LED's.