ltspd has been using incandescent "grow bulbs" over his ref. and he says they work great......
but, fwiw, incandescants are horribly inneficient , put out tons of heat,and the "grow bulbs" simply filter part of the spectrum out to create a color temp more suitable for growing plants-but it means even less light from an already inneficient source.........same thing goes for halogen tons of heat -and not the most efficient.
personally i think the best choice for a refugium bulb might be an hps lamp-if these guys are having success with grow bulbs ,i bet an hps would rock!hps puts out one of the highest (i think the highest)lumens /watt of any light source-and grows plants beautifully;)
all that said im a typical loa 65w user and i like it,dont have room for an hps myself...but maybe on that next big tank someday.........hth![]()



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