Electronic low pressure sodium ballast DC (12V-36V, 18w-180w) AC (110V-220V, 18W-180W) Features: Adopting high frequency output methodology, it improves the efficiency of bulb/ lamp by more than 10%. Compared with low frequency output electronic ballast, the ballast consumption is lowered by 4%, while the efficiency of the whole lighting system is increased by 6%. Application: for low pressure sodium lamps or lighting fixtures in: commercial lighting, outdoor lighting, area lighting. solar street lights, wind street lights, tunnel, highway, observatories, Underpass, solar powered parking lot lighting, Rest area lighting, warehouse lighting