Beautiful setup, you cant beat the amazing look of a glass enclosure!
As for extra heat and since you have live plants I would look into a quad light fixture if you don't already have one. 1 UVB and 3 6.5k bulbs should put off a decent about of heat to help raise the temp in the cage.
Ok that sounds interesting, I use a Arcadia T5 strip 6% and a small Exo Tera heat dome 100w ceramic bulb. Not sure it's enough. Thank you for the advice.