[CherryBrandy]

I found amazon good but there are other sites available. depends on what you need your set up to be. 100 or 150 seem ok for universal use, E125 for the holder but you can send off a question and the company will respond so make sure bulb fits holder - safey regulations etc. they will recommend usually. usually aim for around 34 degrees but again depends on your tortoise species etc etc. lots of detail on this site so don't be afraid to ask or search. Arcadia is good as in they will replace if goes boom within 12 months but other bulbs and heat emitters available. which are just as robust and last and do the job