I have a dedicated sunning cage. It is, quite simply, the outside cage that I put my panther in when weather conditions permit. My area does not boast climate temperatures 24 hours a day for even the summer months, so my chameleons cannot live outside for any part of the year.
Basically, I watch the temperatures. When the temps get above 70ish, I put him out. If they go above 90, I bring him in. My cham never stays out when I am not home and never stays out all night. There are too many predators in my area that are completely willing to rip open a screen cage for a tasty treat. In the cities and more congested areas, I would worry about theft. Honestly, I wonder how many people are actually able to leave their animals out for part or all of the year. I am willing to guess it is a small number.
I think the name "sunning cage" quite nicely describes the outside cages many of us maintain for use on sunny/warm days.
Heika