my temps seems pretty good. i put the thermometer high on top and it seems to be at the range of over 70 and less than 80. maybe about 75 plus minus 3 degrees. i will try to put glass to cover all of the top and maybe get a temp gun instead. In anycase, i just realised i have a digital thermo/hygrometer with probes. and i put them at the floor of the cage and suddenyl realised that the humidity level shoot up to about 95%. i guess maybe the reason why i'm seeing about 80% humidity level is because my wall-mount exo terra hygrometer is up on top nearer to the top of the cage and therefore doesn't reflect the actual humidity level at the bottom of the cage. in anycase i think i will still buy another glass to fully cover the top and then put my light on top of the glass like Don has suggested. I will update again guys! thank you so much!