Lija so what do you suggest I use??

I am open to any and all ideas.

Again room temp is around 66 or 68.

Do you know if 2 of the Exo Light Cycle units would fit on top of an 18X18?
Id really like to run one with day and one with night bulbs, it would control heat (enough or not I dont know)
and it would help simulate the day and night cycles.
Would those provide enough heat?