sorry, forgot to add height! it is about 3 feet at the edges, and the peek is about 4-1/2 feet. it is up off the ground by about 18 inches to allow for more run room (was patterned after the "playhouse coop" in the small coops of the coop section, but husband made it double-deep).
But I do like the idea of a light on for them, even if it does not give off much/no heat, so may go that route anyway.
Pam