FishAddict413
Aquarium Advice Apprentice
I just had a quick lighting question. I have a ballast that I used for 2 48" 40W, 1 flourescent and 1 actinic. The old bulbs fit snuggly in the setting. I could not find the larger 48" bulbs (1" or so round) so i purchased 2 48" 40W T8s. They plug in and fit in the old ballast setting but there is room around them because they are skinnier (1/2" round or so). They light up and are 40W each. Is this safe with the open space around the bulb and being a T8? Thanks for your reply.