I still use & prefer incandescent bulbs (red or black mostly) for adding some overhead warmth- & yes, well-dimmed. My snakes obviously like them too. The bulbs are in metal dome fixtures, NOT "in" the tanks, so no chance of a snake touching them. But manufacturers are phasing out those type of bulbs & shifting to more energy efficient types, so you might want to stock up a little if you like them- who knows if they'll think about us pet-keepers?