Features: 1) Needless to use additional ballast as a substitute of incandescent bulb 2) Easy to install, low investment and maintenance cost 3) Slight color temperature shift, high luminous efficacy (twice of the incandescent lamps) 4) Long lifespan, updated product of incandescent lamps 5) Applications: workplaces, roads, vessels ports, cargo ports, public places, outdoor and indoor places, community and sporting fields, flood lighting