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Re: [APD] Re: Help with lighting choice

MHs lights are not less efficient than Power Compacts so
they won't give off more total heat, watt for watt, than a
PC.  Heat and temperature are not the same thing even
though they are ralated.  You can have a lot of heat
without a high temp and a high temp without a lot of heat,
relatively speaking.  With a MH, the heat is focused in a
smaller volume bulb than a PC bulb and that means the
temperature can be higher hear the MH bulb than PC bulb./ 
The higher localised temperature is something to keep in
mind re placement, but the total heating effect on your
tank won't be higher with a MH than with PCs of comparable

Scott H.

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