if u cant afford the cash to fork out on a tstate like me, the dimmers are a great idea. i have one on both of my UTH's and one on my light. takes a while to get them dialed in to were they need to be, but as long as your room temps stay constant they work like a charm. oh yeh, most lamps have little screw holes so u can fasten them to the top of the cage in case your cat has a habit of getting on top of the cage. i just used a spray bottle and my cat learnt very quickly that it was a no no. good luck.