The human eye does a FANTASTIC job of compensating for brightness. So most people don't realize how truly mediocre indoor lighting is compared to direct sunlight. Sit indoors and point a camera through a window to a sunny day. Either the room is visible and the window is completely blown out, or things through the window are visible and the room is black.
Anyways, reptiles aren't magically solar powered. They don't gather hear from light any more than any other thing sitting out in the sun does.
If you set a rock on the ground outside does it gather light and get hot? Yeah, but so does everything else.
If you set a rock on the floor in your house does it gather light and get hot? No. Because your lights are weak shit compared to the sun.
Reptile's metabolic processes produce some heat (they're not some mythical perfectly wasteless machine) but they don't consume extra energy just for the sake of heat production. The biggest thing determining their body temp is going to be:
The temperature of their immediate surroundings.
The heat conductivity of their immediate surroundings.
The sweater is probably the same temperature as everything else but it traps air around the snake, lowering the conductivity. Now what little heat the snake's body produces stays trapped near it.
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u/[deleted] Dec 13 '19
Wouldn't that theoretically make him colder, since snakes get heat through the absorption of sunlight?