dimmer

باللغة العربية: مُخَفِّتُ إِضَاءَة

1. A rheostat that is used to vary the intensity of a domestic electric light
2. A switch used to select between the low and high headlamp beam on a road vehicle. (usually as "dimmer switch", primarily in North America; elsewhere "dipswitch" or "dipper switch")

الجمع dimmers