On 26/03/2020 17:16, Another Dave wrote:
I quite fancy sitting at my desk in front of my (Linux) desktop computer
and controlling the mains lighting in my den. The existing light switch
is about 2-2.5 metres away from the computer. I envisage a substitute
light switch with a WIFI or Bluetooth controlled dimmer.

Does such a thing exist?

Another Dave

Idratek