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www.reef2reef.com
VintageReefer beat me to it - that's actually a lux meter, not a PAR meter.Don’t know if it’s any good but I found this if anyone’s looking for a par meter
EUROLITE LM-50 Lux Meter | Preset
EUROLITE LM-50 Lux Meter,Eurolite LM-50 Lux Meter

