Hi all

I am currently looking for extra sources to heat my 2' by 2' by 17"h boaphile cage. I'm having trouble because it is a front-opening enclosure with no screen top so I'm not sure if I can use a heat lamp I have a built-in UTH and I side-mounted an extra UTH. The temps currently sit around 82 F and I would love to bump them to around 88 F if possible.

The enclosure resembles the following (no top ventilation is the key here):


Any other heat sources I can look into?
Tips?

Thanks in advance