... 4:High luminous flux Nano low pressure sodium lamp is a newest green,energy saving and environmental protection light ... W, 10-20 times than filament lamp,3-4 times than fluorescent lamp,4 times than HPSL,2 times ... high luminous flux.In 36W LPSL system with 8M lamp pole, illumination to ground is 24.51LUX;But ... in the same height(85W saving lamp), is only 4.41LUX.4,Monochromatic light: The ...