<a href=showthread.php?s=&postid=9581464#post9581464 target=_blank>Originally posted</a> by I am a giraffe
I don't think you'll find the light bulb Melev recommends at Lowes or Home Depot. One of the downsides of that bulb is that it seems to only be readily available online, and you thus have to pay shipping on the bulbs.
You'll also want to shoot for a 5200K bulb; a 6500K bulb would work obviously, but side by side comparisions seem to have shown that 5200K bulbs grow chaeto significantly faster than 6500K bulbs.