Heating a chameleon vivarium???

[bu66a]

Hi
We have a nearly 6 foot high vivarium, around 2 foot wide. We are currently struggling to find a decent, effective way of heating it. We have a active uv heat bulb for him during the day and a 2ft 120watt tubular heater at the bottom which isn't kicking out hardly any heat so were getting rid of that.
We were thinking of getting a 500 watt Microclimate AHS heater, but I was told it wouldn't work.
Any ideas?
Do I just go for a higher wattage tubular green house heater??
Thanks
Kym

[karma]

I just use a heatmat across the back wall but half way up the viv(on a stat)or another way is on the side wall again half way up the viv and they will find where the best sleeping position is for him/herself.


tube heaters are ok in a viv but again i would put it half way up because he will sleep at the top so theres no point having it down the bottom where he wont feel it.