Products: PCB factory, microelectronics factories, printing and so on lithography and chemical engraved etching method, the small printed circuit on a specific substrate. Etching the plastic used on the the 420mm UV or visible light sensitive. If white light with UV lamp lighting, the result is the small circuit of the circuit board etching edge blur, thereby severely reducing the quality of the PCB or printed version of the quality. So you must use the yellow safety lamp. Philips yellow safety lamp with special lighting requirements of the industry designed specifically for PCB and other quality non-UV light source. Special coatings are 100% get rid of UV (420 nm or less UV the area radiation energy is zero). This is currently the only fully UV lamp, all Philips models do not have any other type of lamp. Philips yellow safety lamp while maintaining high brightness and long life. Standard length and standard start-up circuit, so installation is very easy to replace. This product is manufactured by Philips Netherlands, CE certification. Type Lamp headlights voltage lamp current total length of luminous flux of 5000 lumen maintenance NW Origin TLD18W/16 G13 59 0.36 604.0 660 75 100 Netherlands TLD36W/16 G13 103 0.44 1213.6 1580 75 186 Netherlands