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High Pressure Sodium Ballasts

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High pressure sodium (HPS) ballasts power HPS lamps, which are among the most efficient light sources in the traditional HID category. HPS lamps produce a characteristic warm amber-white light and are widely used in outdoor area lighting, street lighting, parking lot fixtures, warehouse lighting, and horticultural applications where high lumen output per watt is the primary requirement. The ballast must match the lamp wattage and operating voltage precisely; common HPS wattages include 70W, 100W, 150W, 250W, 400W, and 1000W.

HPS ballasts are available in magnetic (reactor, lag, and lead-type) and electronic designs. Electronic HPS ballasts offer improved lamp life and lumen maintenance compared to magnetic designs, along with potential for dimming and remote monitoring in advanced controls applications. Most HPS systems also require a compatible ignitor to deliver the high-voltage starting pulse; many ballast kits include the ignitor and capacitor as a matched set for straightforward replacement.

RelightDepot carries replacement high pressure sodium ballasts for the most common commercial wattages in both magnetic and electronic configurations. For related HID components, see our Metal Halide Ballasts and Capacitors and Ignitors. The HPS lamps these ballasts power are available in our HID Lamps section. Browse the full HID Ballasts category to compare all HID ballast types at RelightDepot.