How does Solatubes light output compare to electric lights?
A standard 100-watt incandescent bulb produces 1200 lumens (the standard measurement for light output); a 40-watt 48-inch fluorescent tube produces 2300 lumens. In comparison, the 10-inch Solatube produces up to 4600 lumens, and the 14-inch Solatube will produce up to 9100 lumens, clearly a great deal more lighting than incandescent bulbs or fluorescent tubes.
