Bilco's Lumivent® provides natural daylight, energy efficiency, and the protection of automatic fire venting-all at competitive pricing. It features translucent Lexan® Thermoclear® glazing, an innovative polycarbonate material manufactured by General Electric. Thermoclear maximizes light transmittance while minimizing solar heat gain and is surface treated to prevent ultraviolet degradation. The vent's design provides a sleek look to roofs and its unique, multi-wall cover construction provides an increase of over 40 percent in insulation performance compared to traditional domes. For more information, visit