Honestly bp don't need a daylight spectrum bulb at all, personally I use a red light 24/7. Mine keeps my tank at a good temp gradient and doesn't affect my snakes sleeping patterns. And from my experience people that see high failure rates in bulbs are the ones that switch on and off a lot, as most wear and tear in a bulb occurs at light up. I'd say drop the day bulb and go red 24/7. Some will also recommend a CHE.