Patent ID: 8330362

Claim:
A lamp comprising a light tube of an annular cross sections having an outer surface and an inner surface, with the light tube having a main slot formed in and axially along the outer surface of the light tube, with the main slot being substantially inverted T-shape in cross section and having a mounting recess formed in the outer surface of the light tube and having two opposite mounting surfaces; and two positioning recesses formed in the outer surface of the light tube respectively in the mounting surfaces of the mounting recess of the main slot; an illuminant module mounted within the inner surface of the light tube spaced from the main slot; two end caps mounted respectively on two opposite ends of the light tube, with each end cap having a closed outer end; and an open inner end mounted around a correspond end of the light tube; and a holder extending through the mounting recess and into each of the two positioning recesses of the main slot.