Unity Manufacturing Company has been an innovative prime manufacturer of automotive, truck and emergency vehicle lighting systems and products since 1918. Unity is both a major OEM and aftermarket supplier of auxiliary and emergency lighting products. Unity USA products are made to meet exacting standards and provide maximum performance, reliability and durability. Product performance is verified by independent testing laboratories to meet SAE, ECE and DOT standards as appropriate. VSS carries a large supply of Unity USA spotlights, utility lights, work lights.