This is better in the general section

but ill answer anyway
There is noone on this forum who can tell you exactly what wattage you need.
it depends on a large amount of factors, how warm you room is, how you place the basking spot under the lamp and what type of terrarium you use and how the ventilation is placed.
you may find yourself to need 50, 75, or 100W lamps.
an example: my terrarium is larger than yours, and my room is quite cold in winter, so i use a 100W which is placed 27 cm from the exact warmest basking spot. this means my lizard gets a 30 C average temp on the warmer side with a 32-33 C warmest point. and a cooler side at 22-24 C.
buy all three kinds and measure the temps so you get them right before you get the bts n__n no need for them to be a special brand.
it is recommended to buy a temp gun to measure temps very exactly, i use termometres which isnt very exact though.
dont forget the uvb or D3 supplement : ) either one is fine.