This information is from The US Department of Energy. Find this article and many other online at The DOE's Office of Energy Efficiency and Renewable Energy website.
Increasing your lighting efficiency is one of the fastest ways to decrease
your energy bills. If you replace 25% of your lights in high-use areas with
fluorescents, you can save about 50% of your lighting energy bill.
Indoor Lighting
Use linear fluorescent and energy-efficient compact fluorescent
lamps (CFLs) in fixtures throughout your home to provide high-quality and
high-efficiency lighting. Fluorescent lamps are much more efficient than
incandescent bulbs and last 6 to 10 times longer. Although fluorescent and
compact fluorescent lamps are more expensive than incandescent bulbs, they pay
for themselves by saving energy over their lifetime. Look for the ENERGY STAR®
label when purchasing these products.
Outdoor Lighting
Many homeowners use outdoor lighting for decoration and
security. When shopping for outdoor lights, you will find a variety of products,
from low-voltage pathway lighting to high-pressure sodium floodlights. Many
lights can be controlled with motion detectors, so they only turn on when they
are needed. Some stores also carry lights powered by small photovoltaic (PV)
modules that convert sunlight directly into electricity; consider PV-powered
lights for areas that are not close to an existing power supply line.
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