My name is ***** ***** I have been a Vet tech for 30+ years with speical interest in Reptiles and Reptile Rescue.
Let me start and clarify that the red night light bulb you are using does not offer UVB rays. It is infra red creating a very high heat. You would be better served using the black night light bulb. Red bulbs have been known to cause serious thermal burns.
The auto mister fogger should create enough humidity for the chameleon. Some of the humidity guages can be inacturate and if too wet can cause a fungal growth or cause Respiratory infections.
The ambient Temps in the enclosure should be 72-80 and in the basking area 85-90. hotter than that can cause problems. They will Gape to help release the heat if too warm. The stiffness in the rear legs can be a result of MBD or gout in the chameleon. The fact he is laying at the bottom could be because the enclosure is too warm, or he is getting ill. I do think a Herp Vet visit is in order. There seems to be somethings just not right that will need to be checked out hands on. I am going to give you this Vieled Chamieled Chameleon Care sheet by Florida Chameleons. It is very comprehensive and they are well recognized for information on Chameleons: http://www.veiledchameleoncaresheet.com/
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