Bilco daylighting smoke vent lv-6096b, double leaf, translucent aluminum, 96″l x 60″w all the security and value of an automatic smoke vent with the added benefits of a skylight. The lumivent features a multi-wall polycarbonate cover design that resists uv degradation and offers superior insulation performance over traditional domes. Vents are available in aluminum construction and in a number of ul-listed standard sizes. Polycarbonate panels allow vent to also function as a skylight. sloped cover design meets international building code requirements 2012 ibc 2610.3