What I am hearing that you don't really want to take your chameleon outside necessarily, it's just that you currently do not have a UVB bulb or fixture, and you're trying to come up with a temporary fix to get UVB exposure, is that correct? And it'll take two full weeks to get one? A lot of places sell T5HO bulbs and fixtures and could probably get it to you in less than two weeks - Amazon, Petco, and local reptile stores should all have them. You could conceivably move your entire existing enclosure outside in the morning before it heats up, or purchase an entirely new screen enclosure to use outside for the same purpose and then bring your chameleon back inside after a few hours, but I think the most reasonable solution is probably to call any/all local petstores about UVB lights to see what they have in stock. Petco isn't my favorite, but my understanding is they price match if budgetary constraints are an issue. Does anyone else responding to this thread have any ideas for a speedy source for T5HO?
Not having UVB for two weeks is suboptimal, but I don't think moving your chameleon outside full time for two full weeks without much monitoring is the quick fix you may have been hoping for. I wish it were simpler, but I think doing it right would probably cost more than expediting a T5HO purchase (you'd need a big cage for thermoregulation, lots of plants for shade, maybe shade nets depending on sun exposure, maybe misters hooked up to the hose to make sure it doesn't get too hot and the chameleon can stay hydrated, etc). It would take a lot of fine tuning. Predators are a problem too for animals that stay out after dark - raccoons can break into enclosures and eat your pets. I had an outdoor aviary with doves that was absolutely destroyed by raccoons. They gnawed right through the mesh.