Satco High Pressure Sodium (HPS) light bulbs deliver more lumens per watt over their rated life than most other HID light sources available today. These high-efficiency, golden-white High Pressure Sodium light bulbs meet todays energy-conscious specifications requiring the efficiency of high light output and long life with excellent lumen maintenance. High lumen output yields significant energy savings.
These Satco HYGrade LU400 (S1941) 400 Watt High Pressure Sodium bulbs are perfect for enclosed luminaires. With 50,000 initial lumens, a rated average life of 24,000 hours (based on 10 hours per start) and ANSI Ballast Type S51, these 2100K super warm white bulbs offer maximum efficiency and brighter light compared to incandescent sources. Designed with a clear ET18 bulb and an E39 mogul base, they are a great replacement for GE 85379 LU400/H/ECO, Sylvania 67533 LU400/ECO or Philips 368811 C400S51/ALTO. They are commonly used in areas such as parking lots, terminals, walkways, building facades, bridges, roadways, and industrial installations.
