Patent ID: 8288933

Claim:
A lamp comprising: a) a lamp holder; b) an upper cover comprising two oblique interfaces; c) a lower cover; d) a ballast; e) a double spiral energy-saving light tube comprising a first single spiral light tube and a second single spiral light tube; f) a fixing device; and g) a connecting device; wherein the two oblique interfaces are connected to the lower cover and cooperate with one end of the first single spiral light tube and of the second single spiral light tube, respectively; the first and second spiral energy-saving light tubes have the same structure and are spiral and cylindrical; the first single spiral light tube rotates into the second spiral light tube following the same direction, whereby forming a cylindrical complex; the fixing device is disposed on the cylindrical complex for supporting and fixing the first and second single spiral light tube; one end of the first single spiral light tube and of the second single spiral light tube at one end of the central axis of the complex is received by the two oblique interfaces, respectively; the connecting device for accommodating lamp wires is disposed between the lower cover and another end of the first and second single spiral light tube at the other end of the central axis of the complex; a first end of the first single spiral light tube and of the second single spiral light tube is disposed at one end of the central axis of the complex and received by the two oblique interfaces, respectively; a first exhaust tube and a first filament are disposed on the first end of the first single spiral light tube; a third exhaust tube and a third filament are disposed on the first end of the second single spiral light tube; a second end of the first single spiral light tube and of the second single spiral light tube is disposed at the other end of the central axis of the complex; the connecting device is disposed between the lower cover and the second end of the first single spiral light tube and of the second single spiral light tube; a second exhaust tube and a second filament are disposed on the second end of the first single spiral light tube; a fourth exhaust tube and a fourth filament are disposed on the second end of the second single spiral light tube; an amalgam is disposed in the second and fourth exhaust tubes; and the second end of the first and second single spiral light tube comprises a cold end.