Light Bulbs are one of the essential lighting fixtures in the home.Incandescent Light Bulbs are widely used inside and outside the home. The most familiar incandescent lamp is the A-shaped (A19) incandescent lamp with a medium screw-down base, commonly found in general household lighting (such as table lamps). Incandescent lamps use a lot of energy to produce light, but much of that energy is lost as heat. Since 2007, incandescent bulbs have been phased out, with only a few specialty bulbs exempt, including antique and rough-finished bulbs. As of January 2018, California has banned incandescent light bulbs in favor of energy-saving light bulbs. LED bulbs are 80% more efficient than traditional lighting. These bulbs come in a variety of shapes, including BR, MR, and LED tubes.