Hi guys

I've got a glass vivarium at the minute but I’ve recently bought a wooden vivarium, I’ve varnished and sealed it with aquarium sealant.

i know I can’t put a UTH mat in a wooden viv due to wood not conducting heat, I know I can’t put it in the viv due to thermal blocking, I’ve recently got a heat bulb connected to a dimming thermostat for the new vivarium, I was wondering if I could put something reflective on the top to bounce the heat back down to the bottom because heat rises and a lot is lost in that case, if anyone has anyone ideas it would be fantastic if you could let me know because I trust you guys because I’ve got a lot of advice from you lot

thank you in advance

P.S. I’m from England