Sunlux lamps features: Nickel-plated base will not seize in the socket. Constructed with EYE specified, critical to performance arc tube materials (PCA-ceramic tube, frit sealing glass, electrode emitter). Sunlux EN lamps pass the EPA TCLP test criteria as non-hazardous waste. Lead free base. Low mercury content. Long life performance. All EYE high pressure sodium lamps are designed and manufactured to EYE quality specifications to ensure long life performance (up to 24 000+ hours rated life). Applications: Roadway/streets. Parking lots. Industrial. Warehouses.