The Feit Electric OM100LSDM/5CCTCA/4 is a versatile, all-in-one LED lighting solution designed to replace traditional 100-watt incandescent bulbs while offering customizable brightness and color temperature. Sold as a 4-pack, these A21-shaped bulbs feature built-in switches that allow users to select from four brightness levels (450, 800, 1100, or 1600 lumens) and five shades of white light (2700K to 5000K), making them adaptable for a wide range of settings from warm, ambient lighting to bright task illumination.