1.Two types of symmetrical and asymmetrical grading systems at option with excellent dazzling light control 2.Lamps and lanterns are integrated into unity with electrical appliances, beautifully shaped with simple and convenient installations 3.Dust-proof and water-proof graded up to IP65 4.May be arranged to be used together with 250W- 400W metal halide lamp and high-pressure sodium lamp, therefore with a wide range in application 5.Opening at the front to replace light source for convenience in maintenance