System 3000 Universal LED Dimmer Module Comfort - Switch and dim incandescent lamps, HV halogen lamps, electronic transformers for halogen or LED lamps, dimmable inductive transformers for halogen or LED lamps, as well as HV LED or compact fluorescent lamps. Connection of additional switches is possible. Automatic or manual adjustment of the dimming principle suitable for the load (phase cut-on or phase cut-off). Display of the selected operating mode via LED. Gentle lamp switching on. Switch-on brightness can be permanently stored. Switch on with the last set brightness or stored switch-on brightness. Hotel card function can be activated: light switches on after a power interruption. Minimum brightness can be adjusted. Electronic short-circuit protection. Electronic over-temperature protection. Operation possible with or without a neutral wire connection. In principle, the dimmer can operate without the neutral wire connection, but some LED and CFLi lamps require a neutral wire connection to avoid flickering. When operating without a neutral wire, the minimum load for incandescent lamps, HV halogen, Tronic transformers, and wound transformers increases to 50 W. Electronic transformers and ballasts for LED lamps can be operated in the dimming method specified by the manufacturer. If the ambient temperature exceeds 25 °C, the connected load must be reduced.