Recommendations?

Proud owner of a Western Box Turtle and am wanting to upgrade to a T5 UVB bulb and halogen heat bulb.

My question is, for an 18” high enclosure, which bulbs would be best? Im planning on mounting them on the inside of the lid due to having a metal screen so it may be closer to 16/17” in height.

I was looking at ZooMed 5.0 & 10.0
Arcadia 7% or 12%

Not sure what wattage I need for the halogen.