Designers Edge L-1741 Ecozone 150-Watt, 15000-lumens High Pressure Sodium Security Light Fixture. 12-inch acrylic reflector to filter light. Octagon shaped housing with decorative cooling fins in powder coating finish. Heavy duty 3-point braced mounting arm included. Complete with 150 watt lamp with 15000-Lumens of light output. dusk to dawn photocell means you won"t have to install a switch - UL & CUL listed. This ecozone security light is commonly installed on the sides of buildings because it emits an extreme amount of-Lumens per watt used. -Lumens are the measure of light that comes from a light, where watts are the amount of electricity. A standard 150-watt bulb puts out about 1500-Lumens, this 150-watt puts out 15000, on average 10-times more!