In order to get a larger enclosure heated up I am thinking about putting down a frame on the bottom of the wooden vivarium, put down a heat mat and put a sheet of glass on top of that making sure the hide on the warm side gets to a decent 90F and the cold side around 80F and using a radiator mounted to the top middle of the vivarium to keep up the ambient ..

Any thoughts ? Ceramics and infrared bulbs just don't seem to cut it ...