At 3.5" wide x 3.5" high, the ALD3ST combines clean lines with high-performance direct distribution from a 3” aperture housing and using our patented HE Tech™ lens. Surface, suspended, span, and various wall mounting capabilities, as well as "L", "U", and rectangle pattern options ensure the widest application usage possible. Integration of occupancy sensors, daylight sensors, and LED downlight modules enhance functionality.