The instructions indicate a normal sized light bulb will fit inside the glass enclosure. This is false. I'm reduced to using a mini-globe bulb at 4w or 6w with less luminosity than I'd like from an outdoor light. The glass enclosure and guard are too short to accommodate the height of the bulb. The functionality of this product is as advertised - depending on the setting you select, it will turn on at dusk and off at dawn and vary between luminosity settings based on movement detected by the motion sensor. Pay close attention to the instructions when reading about each setting and setting up the fixture.