Varilight 2 way Single White Dimmer switch. For your safety, electrical products must be installed in accordance with local building regulations. If in any doubt, or where required by the law, consult a competent person who is registered with an electrical self-certification scheme.. Raised profile dimmer switch with plastic plastic white finish. 1 gang internal switch, ideal for controlling 1 circuit. 2 way switches make it possible to control the same light from 2 locations. Dimmer switch by Varilight.