Just a few notes...

Have you ever seen a snake that has curled up inside of light dome? I will assume not... if nothing else get that light out of your enclosure ASAP. Burnt snakes are the worst in that it is always 100% avoidable.

Heat drops are not needed, you maintain a temp gradient and your snake will find the appropriate end of the enclosure day or night and thermoregulate on this own.

UVB lights are not necessary. BPs are nocturnal. I would take the bulb back and get your money back.

Pet stores are notorious for selling product you do not need. And VERY expensive products at that. Regular day and evening light in the room are sufficient for your snake to have a proper schedule.

Bruce