what is wrong?

[scottallert]

problably asked 100 times but
why cant i use other lights like halogen or other common lamps and fixtures on my reef tank?
what is wrong with regular light bulbs on a reef tank?

[carlso63]

Wrong lighting spectrum, Scott...

Corals need light of a certain spectrum and halogens and other common bulbs are the wrong spectrum

[scottallert]

as simple as that. thank you

[pjf]

http://reefcentral.com/gallery/data/500/93304Zooxanthellae_Absorbance.jpg
"Regular" light bulbs don't have this much blue.