TLC do smartlighting for about 50 quid 30 metres range ,they also do an internal remote dimmer which im sure u can adapt for what u want thats got a 50ft range .B) used the internal on a few installs and they worked from outside the house as the lady wanted to switch the lights on b 4 she entered due to the remote location of the property .. have a look at tlc catalouge or look online . hope this helps m8