you dont want to much light though, it should be like natural moon light. right now i am running my pc with lunars, and one lunar from a company on ebay, who makes lights that also have a controller that is set with a natural lunar cycle, yes the moon, it increases and decreases the intensity automatically. fishbowl innovations is the company. they recommend one per 2 ft of aquarium, but i would say 2 per 2 ft. one day when i get some money ill get more, or i might go with some cold cathodes in a custom hood.