even though it is in many places on the Internet, this model would not work with low load LED bulbs, it does me perfectly with a single LED lamp. Ideal for Christmas lights or when an area to be illuminated during hours of darkness (assuming it falls daylight into the room) and when it morgends bright the light will automatically go out to. Compared to a switch with rigid switching times, this twilight switch responds effectively to darkness or brightness. The twilight switch can be combined, so that a lamp comes on at dusk and eg by 24 clock starts again at 6 clock comes back on and goes out again at brightness with a Schaltzeituhr. Therefore optimal power saving and 5 stars.