... depending on the working environment.4).Humidity/moisture resistant, and with IP54 protction degree,it can operate normally in ... 6).Enviroment friendly: no radiation and heavy metal pollution like lead, mercury,UV,IR,RF and other elements.7).Very fast ... ,office zones, paths,commercial premises, store displys,warehouse illumination and under cabinets.Certification: ISO9001:2000; RoHs,CE,UL.prove ...