Several ways- a CHE (no light output) or a dimmed (!) red or black incandescent. I think any of those would be fine. Make sure (for safety) to use a light fixture with a ceramic base (not plastic) & one that's rated for the wattage you'll use, as otherwise heat can build up & melt the plastic base that the light or CHE screws into.
Most snakes dislike bright overhead lights anyway, unless they're something like a diurnal sun-loving coachwhip. Even snakes that are not albino- for example, the nocturnal Trans Pecos rat snakes that I keep: I avoid bright lights on them (including sunlight)-they have large eyes & are known to be sensitive to light.