Testing LED intensity output?? PAR or LUX meter
I want to test what the output is on my diy LED's are but don't know what meter I need, a lux or par meter. I can get a lux meter from J&L for a lot cheaper then the par meter from Apogee.
So if there are any experts out there that can explain the difference in layman's terms so I can understand better it would be helpful.
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