Newer bulbs use a wedge base which can be inserted either way with no issues.

However, the bulb uses only four watts.

Some light bulbs (and water heaters) use a lot of electricity.

The energy-saving incandescent bulbs use about 25% less energy than traditional varieties.

This power is not a measure of the amount of light output, but rather indicates how much energy the bulb will use.

Compact fluorescent bulbs use about 25 percent of the energy and can last 10 times as long.

The bulb uses its energy reserves to create daughter bulbs.

Existing fluorescent bulbs use an electrode to generate a current in the gas.

A fluorescent bulb uses a completely different method to produce light.

"A fluorescent bulb uses less electricity and lasts 10 to 15 times longer than a normal bulb."