The Nernst lamp was an early form of incandescent lamp. Light therapy uses a lightbox which emits far more lumens than a customary incandescent lamp. LED lamps use only about 10% of the energy an incandescent lamp requires. A switch designed for an incandescent lamp load can withstand this inrush current. In 1882 Diehl obtained the first patent on this induction incandescent lamp. Thomas Edison began serious research into developing a practical incandescent lamp in 1878. This was the first successful screw-in replacement for an incandescent lamp. Halogen lamps are a type of incandescent lamp with improved efficiency over regular incandescent lamps. Philips started manufacturing in Thailand in 1960 with an incandescent lamp factory. By comparison, a 60-watt household incandescent lamp will produce about 900 lumens. It was lit by Joseph Swan's incandescent lamp on 3 February 1879. By definition, an incandescent lamp has a CRI of 100. The simplest bicycle headlights use a tungsten filament incandescent lamp or a halogen incandescent lamp. The standard described only incandescent lamp flashlights and was withdrawn in 1996. In 1906 the Osram incandescent lamp was developed by Carl Auer von Welsbach.