Some friends have asked my views (they think I'm an expert because I know more than they do!) on installing dimmer switches to control 2kw infrared heat lamps they have installed in an outdoor area (weather protected).

I have next to no knowledge of these heat lamps and the only dimmer switches I have seen/installed have a maximum load of around 600W.

Has anyone any experience of this type of setup or knows of a suitable dimmer (variateur?).
Thanks in anticipation
Squinch