I use a ceramic bulb for basking and then a pad under the tank for bely heating. Both are thermostat controlled. I have a dozen 75 gallon tanks with this setup. In those dozen tanks are Leachies(Giant Geckos),redtailed boas,ball pythons,bearded dragons,a russian tortoise,Mississippi map turtle.
I dont count my 10 gallons and 5 gallons. have maybe 50 total of the small tanks. I need to invest in some racks My basement is completely full now.