I use RHP and a flourescent light. The Floursecnt light does warm the air quite well and provides a hot spot for the tank above it that generally does not exceed 91 directly over the light (stacked wall of PVC enclosures). Between the light and the RHP with a herpstat on each enclosure, I have no issues mantaining 82 ambient in all the caging with a room temperature at a constant 74-76 with no night drop. The rest of the home is 55 this time of year. But this one 12 x 12 room houses 9 RHP running 24/7 at about 20-30% power, and 12 32 qt tubs and 12 41 qt tubs all heated which in itself raises the room temperature 10-15 degrees plus with my gaming PC set up in that room that thing emits a ton of heat.. . none the less, the RHP works great for my conditions in itself!