Detailed below is a product range of Philips SDW Electronic Ignitor Controllers for single 35W, 50W and 100 Watt High Pressure Sodium Lamps. These electronic control units ensure reliable start and stabilize lamp power for optimal performance. As a result there is minimal colour deviation between differing lamp type. Impregnated, or encapsulated, with electronic ballasts these compact and functional one-piece units are suitable for outdoor applications and come equipped with screw terminal blocks.