Satco S1941 400W ET18 Sodium Haute Pression Bulb 2100K

400W High Pressure Sodium HID Lamp by Satco

The S1941 from Satco is a 400-watt ET18 high pressure sodium lamp designed to replace existing HID bulbs in compatible fixtures. It is suitable for lighting large areas where visibility matters more than color. Key features include 51,000 lumens, a 2100K amber light, and an E39 base.

Key Features and Benefits of This HID Lamp

At 51,000 lumens, this lamp puts out a large amount of light from a single bulb, which helps cover big spaces with fewer fixtures. The trade-off is a CRI (Color Rendering Index) of 22, so colors look muted under its 2100K glow. Rated life is 24,000 hours, which limits replacement frequency.

Where to Use the S1941 HID Lamp

This lamp fits large spaces served by existing 400-watt HID fixtures, where visibility matters more than color appearance. A location rating is not listed for the lamp, so rely on the fixture's own rating for damp or outdoor use. It is not suited to color-critical work.

Installation and Compatibility Checks

Confirm the fixture is designed for a 400-watt high pressure sodium lamp with an E39 base and a matching HPS ballast; do not assume it works in a metal halide fixture. The lamp is 9.63 inches long and 2.25 inches in diameter. Voltage and dimming are not listed.

Additional Buying Context

The lamp is listed as RoHS, and the product page links a specification sheet for further detail. Warranty terms are not stated. If your space needs better color rendering, consider another lamp technology, since high pressure sodium light is naturally amber.