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?
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?
