This is part of the light strip I use over my 75gal-I hang them over the tank on a chain-attached to a rod I have on the ceiling over the tank-This way I can move them up and down to tweak and to work on the tank. You can also build a canopy to use them in. I had to buy a switch to add so that I could turn them on/off without needing to unplug them every time. http://www.walmart.com/ip/Lights-of-...White/19759624
I changed the bulbs and use/buy the GE Daylight 40w 6500k bulbs-they usually are sold in a 2-pack for under $10.00 and I change them out every 12 months since florescent light intensity can be lost over time/with use-even though the lights still shine-the color temp changes and the plants can see it to use for energy/photosynthesis.