does the type of lighting play a huge roll? petcetra is right on my way to work always. every other store is way out of the way... I need a new tube bulb for my aquarium but they don't have any 2' bulb's .. only 2' that is for reptile's .. which is in a different section. would this be safe for the fish? or should i wait a few days. have them stuck under an ordinary lamp till i can get to and different store?