How does Solatubes light output compare to electric lights or traditional skylights?
Light is measured in lumens and energy usage in watts. A standard 100 watt incandescent bulb produces 1200 lumens. A 40-watt, 48-inch fluorescent tube produces 2300 lumens. The 160DS Solatube produces up to 4600 lumens The 290DS Solatube produces up to 9100 lumens The 160DS Solatube compares to a 2′ x 2′ skylight and the 290DS compares to a 2′ x 4′ skylight.
