High intensity discharge (HID) low bay fixtures from Grainger can help provide uniform light distribution in locations where floor-to-ceiling distance is less than 20'H. High-pressure sodium (HPS) and metal halide (MH) high bay fixtures with pulse start can offer increased lumen output, improved lumen maintenance, better color rendering and longer lamp life. Probe start fixtures contain an internal starting electrode or probe that initiates an arc when the lamp is first lit. Shop Grainger today for high-quality HID low bay fixtures.