Replace HPS (High Pressure Sodium) with LED

As a starting point, a 150W HPS is usually replaced by a 40 to 50W LED, a 250W HPS by a 70 to 100W LED, and a 400W HPS by a 120 to 150W LED. Because LED puts its light where it is aimed and appears brighter to the eye than orange sodium light, you can often go to the lower end of each range. The fixtures here are sized for those swaps.

What size LED replaces a 400W high pressure sodium light?

Most 400W HPS fixtures are replaced by an LED in the 120 to 150W range. Mounting height, spacing and the light level you need decide where in that range you land.

Why does LED look so much brighter than high pressure sodium?

HPS produces a narrow orange light with poor color rendering. LED produces white light that the eye reads as brighter and clearer, so faces, vehicles and labels are easier to see at the same or lower lumen levels.

Can I keep my existing HPS fixture and just change the lamp?

Some retrofit lamps exist, but a new LED fixture is usually the better job. It removes the old ballast, comes with a full warranty and is built for the heat and weather the old housing has been taking for years.

Related: replace 400W metal halide with LED, replace 250W metal halide with LED, and HID to LED wattage equivalents.