HB04 High bay is the ideal light source for energy-efficient, low maintenance illumination in large spaces. Designed with durability and functionality in mind, the LED Round High Bay lighting options are versatile and suited to satisfy most all long-term lighting needs. The MHB04 is ideal for light industrial applications, and is your LED replacement for up to 400W MH fixtures. The HB04 also excels in large indoor lighting. Optional built-in motion sensor is both convenient and energy efficient, and ultra-high light efficiency exceeds your expectations.