Lighting tests
Hi,
Since the measurements were made with an offset of 4" away from the MH bulb, the MH can still drive a bit more light power in to a small area than a PC. I suspect that at 18" in depth, that bright area would cover the width of the tank.
In general, MHs run at around 50 to 60 lumens per watt and PCs run at 80 to 92 lumens per watt (from GE lighting). So, PCs are more efficent light sources. But it is harder for PCs to focus light in to a box than a halide. If you can solve that question, then PCs do have a slight advantage over MH.
Hmm...maybe I should get one of those PAR meters....always wanted to know what my overdrives are doing.
- Victor.
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