The LED Canopy Light series can be used for all different applications - including indoor and outdoor lighting replacements. These are great for saving energy in parking garages, warehouses, gas station canopies, and outdoor walkways. The 45w is recommended for ceilings up to 15ft. The fixture uses high quality LED chips with Philips LUMILEDs that have an illumination of 150 lumens per watt per chip.