temp and humidt troubles

i have a 40 gal breeder tank...when my light turns off the amb temp drops to 75F and the humidity jumps to 70-75%...i covered most of the top of the tank. should i get a ceramic bulb and run it all the time? please help thanks

I am having the same pob with my new tank set up, I would go with the ceramic.


1.0 normal 0.1 pastel

A 40g is pretty huge.
Maybe you have something that is smaller??