This bulb can use as normal A21 light bulb, traditional A21 shape with E26 standard base, widely used in kitchen, bedroom, living room, bathroom hallway, garden, garage, porch, patio, front porch lighting, office, hotel. With more than 85+ CRI, A21 LED will provide you beautiful lights and natural colors, ideal for commercial lights outdoor. Gentle light protects your and your family's eyes.