Philips Lighting Ceramalux Alto 400-Watt ED18 E39 single contact Mogul screw base high-pressure sodium lamp offers 45000 mean Lumens for bright and crisp light output. It has voltage rating of 100 Volts and 4.6 Amps. This lamp in clear color, has color rendering index of 21 and color temperature of 2100K to ensure optimal light level in the surrounding. It measures 9-3/4 Inch x 2.25 Inch Dia. Lamp delivers average life of 24000 hours. Lamp features hard glass construction with brass cap. Lamp contains 23.5 mg of mercury. Cap-base of this lamp withstands temperature of 210 deg C. High-pressure sodium lamp is perfect for general and street lighting. It finds applications in industrial, warehouses, post top applications and parking lots.LessBrightness Lumens50,000 lmHighlighted FeaturesNot dimmableLifespan Hours24,000 hoursTechnology TypeHigh Pressure SodiumWattage Equivalent70 wattBase SizeE39Base TypeMogul ScrewBulb ColorWarm WhiteColor Temperature2100KDesign ShapeED18FinishClearEnergy Consumption400 WattsGermicidal FunctionNoLocation UseIndoor/OutdoorColor Rendering Index21Diameter2.25 inLength9-3/4 inLightWarm WhiteVoltage Rating115VBeam Angle360 °Material TypeGlass