This is what you want mate - the UK branch is based in Uxbridge (near to all the major London Film studios - Elstree, Pinewood etc).
http://www.arri.de/prod/lighting/index.htm
I had a look at the ceramic ones back in January and they're cool to the touch - ideal in confined spaces.
One of the field tests involves throwing buckets of water over them while they're switched on, then leaving hosepipes playing on them for 48 hours.
These things are tough, believe me.