http://news.bbc.co.uk/1/hi/sci/tech/8394168.stm

Is a link to a demo of GW according to he BBC.

However to me it looks more like they have the left hand lamp offset a bit
so it doesn't heat as much.

That is aside from the fact that CO2 will have different conductive and
convective properties which are nothing to do with GW's greenhouse effect.

Just how desperate are these people that want to fake results? 8-)