... , in particular, satisfying the environmental protection needs.4.High power factor, cosΦ ≥ 0.98, low current harmonic, constant ... voltage power supply, constant luminous flux output, its power ≤ 0.02, input power ≈ output power.5.With color-rendering index ... with high shock resistance.8.It is available t both AC and DC power, and direct solar power lighting. Street Lights