GE LIGHTING 5w Biax S/E 4 Pin Lamp - 840 - 4000k - Cool White -  2G7
This lamp has an external starter/control for use with electronic control gear and dimming emergency applications. compact fluorescent for various applications including wall lights and task lamps. Compact fluorescent lamps are low-pressure discharge lamps that operate on the following principle: after ignition radiation from the mercury vapour in the glass tube Is converted is converted by the phosphors on the inside of the glass tube into visible light, in a light colour that depends on the phosphors used. Control gear ensures the correct luminous flux is emitted. On integrated compact fluorescent lamps and circular lamps the control gear is integrated in the lamp casing, whereas external control gear is needed for non-integrated CFLs.