Lighting accounts for 30% to 50% of a buildings energy use or about 17 percent of total annual US electricity consumption. 90% of the energy emitted by incandescent bulbs is in the form of heat, only 10% is in the form of light. This means that not only is money wasted on inefficient lighting, but using incandescent bulbs increases cooling costs
Today’s energy-efficient bulbs are available in the wide range of colors and light levels you’ve come to expect. While the initial price of energy-efficient bulbs is typically higher than traditional incandescent light bulbs, newer bulbs cost less to operate, saving you money over the life of the bulb. Many of the newer bulbs last significantly longer than traditional bulbs, so you won’t need to replace them as often.