Philips 368837 - C1000S52/ALTO High Pressure Sodium Light Bulb

1000 watt 235 volt E25 Mogul Screw (E39) Base 2,100K Clear Universal Burn ALTO Ceramalux High Pressure Sodium HID Philips Light BulbYou may also like Philips 100w BD17 Clear 4200k Cool White MasterColor CDM Elite HID Light Bulb.