The standard, incandescent
"A" lamps are on their way out. They are the least efficient way to
generate light so regulations are coming into play that preclude their
manufacture and sale. The
logic behind this legislated replacement isn't new and really
makes a lot of sense.
Furniture stores typically have a 60 watt light bulb in table lamps throughout the store. Those contribute to the "plug load" portion of the lighting bill. Those can be replaced with a 13 watt compact fluorescent saving 47 watts or $18.80 per year. A 40 watt can be replaced with a 9 watt saving 31 watts or $12.40 per year.
The rule of thumb is to divide the incandescent watts by 4 to get the compact fluorescent equivalent. Where the bulb is being used in a "critical" situation go up one size to make sure you get good light output that will continue over the life of the bulb. Look for the "Energy Star" logo as an assurance that you are buying a bulb that meets standards. Also buy an indoor temperature, 2700 degrees on the Kelvin scale (2700K) rather than a daylight, 5000K, rating.
The "twist" compact fluorescent is suitable for use in any "base down" socket like a table lamp or wall sconce. With the right size and the right color temperature saving energy and money will be a pleasant experience.
Reflector bulbs were the first casualty of energy efficiency. Some versions were banned by the Energy Policy Act of 1992. Reflectors used to be the mainstay of display lighting until replaced by the halogen lamp. Some reflectors were modified with a bulge to get more lumens out of the lamp but are still inefficient when compares to halogen or compact fluorescents.
Downlights, typically found in hallways or used for ambient
lighting, can use
a compact fluorescent reflector to save both energy and heat.
A 23-watt, compact fluorescent PAR from Philips produces as
many lumens as a 90-watt halogen. Lumens are 1300 to 1350 from the
halogen but savings are $26.80 per year. The bulb also lasts twice as
long which makes it a good choice for ambient lighting.
The benefits of this action are lower utility bills and maintenance cost. Lower wattage of the compact fluorescent and longer life make it possible to achieve results without much cost. Buy a quality product so you will be satisfied with the visual environment.