DALI rotary potentiometer Tunable white with power supply, soft locking, light control. DALI rotary potentiometer Tunable white with soft locking, switch-on brightness can be saved in the event of a power failure, basic brightness can be adjusted (e.g. for fluorescent lamps and low-voltage halogen lamps), control via central telegram (broadcast), short-circuit-proof and overload-proof (electronic fuse), with push-button switch, with screw terminals.