The luminaire is TRIAC dimmable (i.e. via wall switch). The luminaire can be dimmed via leading edge phase control as well as trailing edge phase control. Use either a dimmer with the symbols R or L (for leading edge phase control) on the packaging or with the symbol C (for trailing edge phase control). We recommend choosing a universal dimmer that is suitable for both leading edge phase control (R, L) and trailing edge phase control (C) to ensure maximum flexibility and compatibility. Such a dimmer is usually marked with R, L and C.