1, Super-clase high power LED 2,First-class stainless steel 3, High luminous efficiency 4, Widey working current range ... illumination" Features: 1, Super-clase high power LED which is encapsulated by high efficiency and latest heat disipation structure. 2 ... Driver: 6, 9W with internal power regulator, 18W, 27W, 36W with external power regulator ( Separate one driver), If you need external power ...