Par meter

[Calireefer92]

What a good par meter for led I was looking at the MQ-210X Original Underwater Quantum PAR Meter

 

[Ron Reefman]

Almost any PAR meter is better than no PAR meter. I still use the Apogee meter I bought about 15 years ago. And literally dozens of friends have borrowed it. Heck, I only just replaced the 9 volt battery a few months ago!