... 1,wind solar cell 2,CE,RoSH,ISO9001 certificate. 3,Good effect of lighting. 4,High power efficiency. wind solar cellEffsun solar energy characteristic ... .3,Reliable and durability:under no wind and solar conditions can keep lighting 4days,above 10 hours ... ,Low power:whole system using industrical devices,adopting high temperature,cold,wet and so on conditions.9 ... happy to give you a call. wind solar cell