Sylvania Hi-Spot halogen bulbs have an E27 or E14 Edison screw base or a base with two pins. Take a good look at your current light source or fixture to make sure which one you need. These light sources are famous for their high color rendering and MR16 shape. Our advice is to not only chose the same base or shape but also maintain the same light color and wattage. This way, you make sure to keep your current light effect when using your new Sylvania Hi-Spot halogen bulb. Is your desired bulb not on stock? Check our LED alternatives!