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mikekomm
01-31-2011, 10:21 PM
I have a few planted tanks and I want to be able to test my compact fluorescent lights to determine when their output has diminished. I'm curious about whether the intensity diminishes or the part of the light spectrum output changes.

I'm looking at two meters but it seems that both of them measure "intensity", not "spectrum".

http://www.marineandreef.com/MW700_Lux_Light_Meter_Milwaukee_Instruments_p/RMI00370.htm

http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=14821

Does anyone have experience with this or recommendations?