Incandescent lighting has been the mainstay of residential, commercial and industrial lighting for many years but its' future is now in a state of flux as the impact of energy reduction legislation and the emergence of competing technologies alter the marketplace. Incandescent lamps are of relatively simple construction with a coiled tungsten wire filament inside a glass envelope containing a mixture of neon and argon gas at below atmospheric pressure. The type of filament coil is relatively important in the northwest region of the United States as well as in the Tennessee valley area. As the majority of electricity in these regions is provided by hydroelectric power the filament coils rated at 130 volts offer an almost 100% increase in lamp life for a nominal loss of 6% to 8% of available lumens. While the options of size, shape, wattage and colors of incandescent lamps are very broad, as always, please do not hesitate to contact a Kelsun sales representative if you cannot locate the product you require.