the human body-sensitive courtyard lamps

the daybreak ,there are not many people ,the lamps can be set to sensing mode.
   F:It is very suitable for residential areas,schools,parks and other relevant areas.
Technical paramenters:
  mast height:3-5m
  system voltage:D12/24v
  applicable lighting source:5w-20w energy saving lamps,LED
  Daily service hours:all night
  cloudy/rainy days:8days
  lumen:2000Lm
  Lighting efficiency :100lm/w
  Illumination:12-26LUX
  Wind resistance:41.4m/s
  service temperature:-30

If the lighting period can be shortened without affecting the normal need of lighting,the
manufacturing costs of the solar p