This may be a good way to go for a bulb if you have a T8 fixture. I'm thinking of giving this a shot myself for the next bulb I get.
Coralife T8 10,000k output fluorescent.
http://www.petmountain.com/product/...81/coralife-10-000k-daylight-fluorescent.html
Coralife T8 10,000k output fluorescent.
http://www.petmountain.com/product/...81/coralife-10-000k-daylight-fluorescent.html