1,Stainless steel 316 2,With semileds led chips 3,IP68 4,3W, 6W, 9W, 18W, 27W, 36W ... high power LED which is encapsulated by high efficiency and latest heat disipation structure. 2), First-class stainless steel(316) or bronzeAB2 ... current driver will be shutdown in order to protect the LED without damage, and when environment temperature and voltage is normal ...