Modern light bulbs come in a variety of sizes and shapes. Depending on your light fixture, you might have different requirements. Before buying bulbs, you need to determine what cap type your light fixture or lamp is. Usually, you can find this by looking at the sticker placed on your fitting, or in the lamp's specifications/instructions. This pack of 6 LED light bulbs have an SES / E14 (small screw cap) which are ideal for smaller household lamps and lights. These bulbs are 4W (equivalent light output to 40W standard bulbs) and give off a cool white glow (6500K). They use the brightest LED's to emit 400 lumens. Energy rating: F