As mentioned, once in a while is OK but if it happenes frequently that food will sit in their cool belly all night and ferment - not a good thing.
Lele,
What do you suppose happens to a wild chameleon if it scores itself some nice meals just before the sun goes down?
How often do you suppose that might happen in nature?
Not only are most cham keepers homes heated in winter anyway, some folks provide night heat where temps drop very much at night.
Your cham not only regulary experiences night time temp drops, it needs them.
Provided your cham has heat throughout the day and is well hydrated, I think it will be fine with digesting its food, provided it has heat to bask the following day. Insects are not large meals and your lizard is an opportunistic feeder that will feed at any opportunity when awake if hungry.
Cheers
P.S Lizards dont immeadiately lose all body heat and turn stone cold after lights out!
Digestion continues, albeit at an ever slowly decreasing rate, before being recharged the follwing morning.
That's the beauty of being Solar powered!
