I unpacked the LED lamp, screwed like any ordinary light bulb, everything works fine. The lamp is installed in the outdoor area in front of the garage in a housing with motion, everything works perfectly. When I consider how long the so-called. Need energy-saving lamps to produce a usable light at temperatures below zero, this is like old times, where the bulb immediately brought more light, only that the LED 10x holds long, and only 1 / 10th the energy consumed. This makes the purchase price of 7.99 but in time for it. Incidentally: The so-called energy-saving lamp is only identified after a burning time of several hours paid at a time, short assignments she likes even less than the bulb, and it consumes considerably more during the first minutes, as indicated.. Is LED at different that needs no warm-up time.