What a sweet deal I got, Repti Racks was having an overstock clearance sale on a black textured an a white cage. Both were 24x18x12 and I got them brand new for $59 ea! Pending UPS delivery time, I am supposed to have them in about a week

What would be the best method to heat them, I did a search and didn't turn up as much info as I thought I would. Should I run Flexwatt across the back or put it on one side? I was thinking I would run 2 4" strips across the back on the bottom.