BG NBS84P 4 Gang, 2 Way, 400w Dimmer Switches-push Type Brushed Steel

Minimum mounting box depth 25mm

10mm spacer available to provide additional wiring space (817 - Sq. 818 - Rect)

Suitable for compact fluorescent lamps(CFL) and LED Dimming

There can be issues with dimming CFL and LED lamps at a low lighting level; the Nexus dimmer products have an adjustable minimum level feature which can be used to adjust the lighting output at a low level to stabilise the load