closed chambers

[vikki]

I have been reading a lot on an international (but mainly American) forum about closed chambers, these generally appear to be similar to vivariums but are kept very humid and seem to mainly be used for young tortoises in the belief that it produces smoother growth. Anyone with any thoughts etc? There is also somebody doing an experiment at not using heat lamps but instead using lights/uv and heat panels - in view of the increasing awareness of the dehydrating effects of heat lamps it could be interesting to see results. I realise that as much time outdoors is always best but wondered what others views of these sort of methods are?