Water-protected surface-mounted device with impact-resistant housing. With time function. The twilight timer combines the functions of a twilight switch and a timer in one device. You can choose between three functions. Twilight function: When the twilight threshold is reached, the lighting is switched on in the evening and off in the morning. Automatic function: In the evening, the lighting is switched on when the set twilight threshold is reached and switched off again at a preset time (e.g. 11 p.m.). In the morning, the lighting is switched on again at a preset time (e.g. 5 a.m.) and switched off when the twilight threshold is reached. Semi-automatic function: In the evening, the lighting is switched on when the set twilight threshold is reached and switched off again at a preset time (e.g. 11 p.m.).