So, even though I just built my own little rack, I've decided to go ahead and get a T8 enclosure from Animal Plastics as well. This particular enclosure will be for one BP when the time comes. Here is the setup I am planning on going with. Keep in mind, This will be in my living room where the winter temps can average around 68-70 degrees.

T8 - sliding glass doors, door lock, white LED.
Reptile Basics - 80w RHP
12"x24" heat tape under one side of the enclosure - This will provide my hot side, from the front to the back of the cage, 12" wide.
Identical hides
water bowl(s) sized for correct humidity
Kraft indented paper substrate
Herpstat II for controlling heat tape and RHP.
Accurites (2) for monitoring ambient temps inside the cage.

My biggest concern was whether or not one RHP would be sufficient for heating the cage with room temps that can dip down to 70 degrees? Should I use two 80w RHP's?

I don't really have any experience with the RHP's, so I'm not sure what they are capable of. My only experience is with heat tape and CHE's.

Thank you.