Most pet stores only carry T 8's --- and the longest for a T 8 is a 20" fixture from a store that I know of some do carry a longer fixture but most do not -- the links I sent you that store is good and they are fast -- your going to need that UVB replaced ASAP- I would go down to a single dome for your basking light make sure you have a digital probe thermometer to get actual basking temps NO stick ons they are inaccurate -- the UVB and basking temps are the most important thing in that tank --- its getting too cold now to get them outside if you live where it does it get cold - summer is great if your in the middle of switching out UVB's cuz then you can get them outside for good UVB - that coil you have is pretty much useless it does not provide adequate UVB if any at all -- you can go look at your stores and see what they carry I do recommend the 24" fixture w/ the Arcadia - it would not need to be changed out for a year -- the T 8's need to be changed out every 6 months and I recommend a month prior to the 6
Karrie