Aluminum and magnesium alloy profile heat sink which is a material used on air craft, which is lighter than normal aluminum heat sink but with better heat dissipation. Can't be deformable which is good for storage and sale.

LSM's own molding OVAL shape, which is good for heat dissipation 

Luminous effeciency : We got this tube tested which shown 18w tube can meet 1600+ lm/w, so luminous efficiency up to 90lm/w.

No dark spot on each side

One end AC input is available, no need to take away the ballast in the fixture