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Measuring Effective Light


The "Flourex Light'  thread reminds me of a similar discussion about a year 
or so ago.  My contribution to that was to suggest that watts per gallon was 
at best a rough estimate of the light available to plants, and that there 
should be better measure.   Compact fluorescent technology apparently has 
further weakened the wpg tool.

I had suggested that we hobbyists, through experimentation or calculation, 
determine the amount of light energy from various bulb/ballast/reflector 
combinations that actually reaches the bottom of the aquarium, measured at 
various depths.  This could be made available in the form of a spreadsheet 
and end for all time much of the questions about various kinds of light.  
Almost, anyway.

It would take some effort to set this up initially, but relatively little to 
maintain it.

The response I received then was less than overwhelming.  Maybe this is a 
good time to bring it up again?  If I had the skills I would do it, but maybe
Wayne and/or Scott and/or Tom and/or the many other very knowledgeable people 
here could take a stab at it.

Best wishes,