Hey, there, if hes already going down for the winter, your best to let him go down for a while before getting him back up again. Just dont let him stay down all winter give him a couple of months and then raise your temps again. I heard of a recent death of a beardy where the vet was involved and trying to force feed a sick beardy that would nt eat, wanted to sleep all the time, was scratching at the corners and under things etcc...Also applying wierd high temps day and night etcc..Yes, some vets dont know much about reptiles! But anyway, this beardy died. Now Im not saying for one minute that there wasnt something else wrong with it, but I knew its history, and it was fine. I wonder if by mucking around with it, (in good intention) actually caused it harm??
As others have said, I'd rather use a normal reflector globe from safeway / bunnings etc, white light to apply a really light enclosure with heat, and obviously UV.
No need for heat at night at all. I never have, and our place gets pretty cold.
If they go into brumation, lower your temps. Reason for this is when they brumate, they dont eat / drink for quite a while. For them to do this and come out in a healthy state, u need them to lower their metabolism. To help them do this, u need cooler temps. If they want to brumate,but they still have the same high temps, their body metabolism may still stay high, thus chewing through their fat stores faster, and thus they may not come out of brumation, or come out in a poor state.
Yes, brumation and cooler periods is needed ussually for mating to occur and successful breeding, but its a natural occurance in the wild because of the temps over winter and occurs even in young lizards
Anyway, just my thoughts
Cheers
And good luck
