LED light bulbs are the modern lighting standard, combining the best of energy-efficiency, product life span, and quality of light. LED lights are designed to replace older technology, and can find use in nearly any application. These lights use less energy than other types and run cool to the touch. Because of their cost-effectiveness and long-life spans, they're typically recommended over their older counterparts.ASD Lighting's model ASD-LVF21-18D20CC-BK light bulb uses 20W of power, with a brightness of 1570LM lumens. It fits a base, and produces an adjustable specrum of warm white light to daylight. With typical use, it lasts about hours on average before requiring a replacement. This product is sold in multiples of 1.