Light Bulb

I have a 33 gallon tank. The hot side should be about 92°. What watt light bulb should I use?

If you're keeping a BP, I'd stick with a maximum of 90*, just in case your measurements might be a few degrees off.

Also, we cannot begin to tell you what size bulb you need to achieve needed temperatures because everyone's room (or home) is kept at different temps. and that
matters a great deal. A warmer ambient room temperature means you need to add way less heat to a tank...conversely, a cold room needs a lot more. You can also
minimize the amount of extra warmth you need by insulating the back, sides & bottom of a glass tank so that more of the heat that goes in actually gets retained.
This is also why we always suggest that you set up & test out your tank or enclosure for at least a week before bringing home any pet to put inside, just in case you
need to buy (or even order?) more things to get it just right.

I trust (HOPE?) you're using a thermostat to control heating devices for safety??? (yours and especially your pet's safety)

And please don't be afraid to start new threads for your questions...this one you're responding to is 8 years old...OK? ;) (I'm hoping a moderator will move it???)