I'll second JetCat on the light and heat. I think a red light is better if you're going with 24 hour light, but you can get ceramic coils that provide heat and not light if you want to heat them. I personally believe that birds need downtime and a dark period every day. I provide supplemental light fro 14-15 hours total, but no more. I live in Canada and, while this winter's been remarkably warm, the last two got down to -25 to -30 F and stayed there for days or weeks. I don't give my birds heat because they can handle the cold if they've got good ventilation to get rid of the moisture and no drafts. If you give them heat and the power goes out, they big change can kill them. I heat my water but that's it.
Ok good to know they can handle cold. Our are in outside pens but most of the cage is protected from wind. And they definitely have good ventilation, but we live in a very humid climate (east Texas) so is that an issue as far as moisture is concerned?
Sorry I have so many questions, I just like the idea of less light, heat, $$ on electricity and a healthier more natural life for the bird. I'm always open to improving my set up/system. I'd really like a building outside to protect them even more.