minumum capacity??

[KITKAT]

Lighting is not required for a garter snake, mine have done fine without it, while it helps if your very restricted on budget its best to keep your money for either food or something of higher priority.

I want to add... unless you are using the light for heat. If you live in a heavily air conditioned house, it can be too cold in summer if the thermostat is set in the low 70's.