The Energy Star website and Amazon.com provide cross-reference guides for incandescent and energy-saving light bulbs. These online sites also compare the types of energy-saving light bulbs.
The Energy Star "Learn About Brightness" Web page includes a brightness chart listing the wattage of incandescent light bulbs against the lumens that produce the same brightness in energy-saving light bulbs. This page includes links to choosing the right colored bulbs for creating different lighting moods, information on LED and CPL light bulbs, and an interactive guide for choosing different bulbs around the home.
Amazon.com offers a Light Bulb Buyers Guide with images for the various shapes and bases, an energy-efficiency comparison chart, a wattage/lumens comparison chart and a color temperature chart.