Function and Features different kinds of lihgts to satisfy different demands be usedto obstruction lighting as well as nightscape lighting the same way of wirring, so easy to install and widely to use all compact structure and pretty figures standardized design, with the advantages of shockproof and high corrosion resistance; heat caused from lamp housing is isolated by its sheel; the sheel is structured by spray painted steel base and steel screw stem; thermal stability, well anti-impact strongth lamps work alternatly in the light to guarantee long liftime highly reliable-little maintenance cost saving strong light intensity to warnning