Upgrading your ancient incandescents to more efficient alternatives not only improves the look and feel of your home, but provides the same amount of light for less money. For the same 25,000 hours of use at $0.12 per kWh, electrical consumption drops dramatically, from $180 with an incandescent, to $42 with a comparable CFL - $30 with an LED. Plus, energy efficient bulbs produce about 75% less heat, helping you save additional summer cooling dollars.