Companies are evaluating the energy intensity of their buildings. Many companies are Companies are changing out their old incandescent light bulbs to energy-efficient LED (light-emitting diode) or CFL compact fluorescent lamp) lighting, which often results in a payback of energy cost savings in less than one year.
In addition, these types of bulbs have a lon ger life, thus requiring less labor cost to change them when they burn out. Tax credits grants and rebates are also often available for companies investing in energy-saving equipment. For example, the Empire State Building in New York City recently went through a lighting, window, and heating, ventilation, and air-conditioning (HVAC retrofit. Annual energy savings are expected to be over 20%, or $4.4 million per year, The environmental savings are clear: less fossil fuel is used, fewer greenhouse gasses are emitted, and less material is needed to produce replacement bulbs