In the study I have the 8 x 20 Watt halogen lamps in the wooden ceiling replaced by 8 x 4 Watt LED spots of Power online. For working at the desk like a bright sky Light - perfect! General and for work on the computer the whole was a bit too bright. 2 of these dimmers (1 for each workstation) installed, shut wooden ceiling again, and now so can adjust his light as he / she likes everyone "The remotes do not interfere with each other;. you can with the integrated on-off switch even individual places quite "darken" Functioning but only with LED transformer. Strong buy recommendation !!!!!