The Planted Tank Forum - View Single Post - Lighting an Aquarium with PAR instead of Watts
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post #89 of (permalink) Old 12-16-2012, 06:40 AM
Algae Grower
Join Date: Dec 2012
Location: Honolulu
Posts: 6
Is a watt a watt regardless of the source?

Compare (2) 90 watt LED fixtures (180 watt total) to a hybrid fixture with (1) 150 watt Metal Halide & (1) 39 watt PC. (190 watts total). Will it actually cost less to run the LED lamps as opposed to the hybrid fixture with Metal Halide & PC lamps? Or is a watt a watt regardless of the source?

Last edited by thegr8wendt; 12-16-2012 at 06:42 AM. Reason: spelling
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