... common 70W HPS street lamp.2. Small size, low weight:Separate electronic ballast, less than half size and ... aluminum, reflector:aluminum stretching board with good reflecting,light cover: toughened glass with high light transmission, high temperature resistance, anti-glare, ... , maintenance-free, deep recycles lead-acid storage battery with high performance7Working tome10 hr/d: 6 H full-energy mode ...