Lamp high pressure sodium with internal ignitor, Ignitron EN. Environmentally friendly in that Ignitron lamps pass EPA, TCLP test criteria as non-hazardous waste: lead free base, and low mercury content. Nickel-plated base will not seize in the socket eliminating additional labour and spare parts associated with prying a lamp base out of a fixture socket. Applications: street/highway lighting, warehouse lighting, parking areas, security.