Infra red bulb or moonlight bulb?

[Sonny1318]

I use Zoo Med nightlight red bulbs. I have six tanks set up using this as their only heat source. 40w for twenty long tanks. This gives me a hot spot of around 88 to 90. And a ambeint of 82 to 84. I am happy to say I have six very healthy ball pythons, that eat on a regular basis (for ball pythons that is). They all have a healthy sheen. As far as how long they last, is roughly 6 or more months. Hope this helps.