Well, coralife used to make a T5NO fixture but apparently they discontinued it. And in my little google search I was unable to find any other companies that make one for aquariums. sooo...you can either go to home depot/Lowes and see what they have for T5NO fixtures and you will have to do a little DIY or you can go for T5HO fixtures. I think if you were to get a cheapo 2 bulb T5HO fixture from Odyssea and hung it ~ 6" above the tank you could be in the medium light range. 48" T5 HO Aquarium Light Strip Hood Plant 6500K 108W | eBay i personally love these fixtures as they are cheap and effective. You could even get the 4 bulb fixture and just use 2 of the bulbs. This way you will have the ability to increase the lighting at any point, if you desire. I have the 4 bulb version over my 75 gallon and it is really great.