DS-LED is a unique bi-level LED luminaire controlled by 2 external infrared motion sensors, designed to provide safe, dependable illumination while conserving energy. Suitable for surface or chain mounting. Bi-level fixtures operate at 20 percent standby light level, offering energy savings, safety and security with full light output instantly upon occupancy with areas fully lit only as needed. Ideal for stairwells, utility rooms and other areas maximum light levels are not required on a constant basis. Sensors are field adjustable foroptimum coverage, range and time delay using optional IR remote control. Design Lights Consortium DLC qualified luminaire.