the roosts are not high at all. This is the inside of the chicken tractor, which is all I have right now. And I have put one of those stick on LED lights in the corner for them. It's not super bright, but hopefully makes things less scary. ;)
So far my two girls haven't sat on either of their roosts (2x4, wide side up or 1x2, wide side up), that I've seen. Before I got them, their living quarters did not have any sort of perch or nest box for them. At least one has figured out the nest box, but they both just sit on the floor like...