Varilight dimmer switches have an industry-wide reputation for exceptional performance, long life and innovation at attractive prices. Like all Varilight products these dimmers are designed to meet the latest European Safety Legislation. It is important to select the correct dimmer switch for your application so please read the following information carefully. Our standard dimmers can be used with mains voltage lighting and good quality low-voltage electronic transformers. The lights are turned on and off by a rotary on/off click action and dimmed by a rotary control knob. Rotary on/off dimmers are only suitable for 1-way circuits. When selecting a standard dimmer add up the wattages of the bulbs or transformers you wish to dim and choose a dimmer with a suitable maximum load rating. Rotary dimmers can be used for mains incandescent GLS lamps (standard mains light bulbs), up to the maximum load as specified on the dimmer. They can also dim GU10 or similar Hi Spot Mains Halogen lamps (only use quality UK supplied lamps) up to the maximum load as specified on dimmer. Good quality dimmable electronic transformers can also be dimmed using this dimmer, please note that noise levels can depend on the quality of the transformer being used. The V-Dim switches are not suitable for use with LEDbulbs. Max Load 400 Watt Min Load 60 Watt Fits in a 25mm Deep Wall Box V-Dim, Electronic Transformers, Standard Bulbs, GU10 and Mains Halogen Wattage  400 W Manufacturer Code  SIN-HQ1W Manufacturer DESC.  HQ1W