Satco ET23.5 high pressure sodium bulb delivers powerful, energy-efficient lighting for commercial and industrial applications. With 51,000 lumens of output and a long average rated life of 24,000 hours, this bulb provides reliable illumination for warehouses, parking lots, street lights and security lighting.

• 400-watt high pressure sodium (HPS) bulb
• ET23.5 lamp shape with E39 mogul base
• 51,000 lumens output
• 2100K warm color temperature
• Average rated life: 24,000 hours
• Universal operating position
• S51 ANSI code
• Clear finish
• 1 bulb per box