What is the Compact Fluorescent Lamp(CFL)?
Unlike the basic, straight tubular lamps, there are a large number of special fluorescents with more compact form, so-called compact fluorescent lamps. They commonly include shapes like circular, U, W types; in the latter case parallel-tube type, in which the discharge tube is given a double or even multi-bends. More recently these CFLs, which all work on the principle outlined above, have an integral gear(normally electronic ballast), screw cap(often standard medium base) and outer envelope(glass or plastic bulb cover). In general, CFLs are the most significant lighting advance developed in recent years. They combine the efficiency of fluorescent lighting with the convenience and popularity of incandescent fixtures. They are one of the best energy efficiency investments available.
