You can use any T8 fluorescent light fixture, which you can get from any hardware store or big box store. The cheapest one I've seen is a 24" from Walmart for about $10.
I just set Swordtail's timer for his bath and paused it so I could actually fill his soaking bowl up and he crawled over my phone and canceled the timer
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!