LED lamp: 28W, 20lux /5m          
Color temperature: 5500K      
Pole: 5m high, steel, with galvanizing treatment
Pole distance: 20m        
Solar panel: 50W, poly/monocrystalline      
Conversion efficiency: 17%      
Controller: 12V10A solar charge controller    
Battery: 12V80AH, deep recycles lead-acid battery
Working time: 8 hours/day, and 3 overcast and rainy days