Most people tend to think more about the style of lamp they buy than the
type of bulb. But it's important to know there are many things you can do to
make the lighting in your home more effective and efficient.
Below are frequently asked questions about lighting.
Q: How much does it cost to operate a 100-watt incandescent light bulb for eight hours?
A: You can estimate the cost to operate most electrical devices, including lighting, with the following formula: (watts x hours of operation)/1,000) x $/kWh.
Example — 100-watt light bulb:
(100 watts x eight hours per day)/1,000 x $0.10
800/1,000 x $0.10
0.8 x $0.10
$0.08 per eight hours
You can save 75% on your lighting costs by switching to compact fluorescent light bulbs (CFLs). A 27-watt CFL has the same light output as a 100-watt incandescent bulb and costs only 0.$02 per eight hours.
Example — 27-watt light bulb:
(27 watts x eight hours per day)/1,000 x $0.10
216/1,000 x $0.10
0.216 x $0.10
$0.02 per eight hours
Q: What's the true story about CFLs?
A: CFLs are an ideal substitute for incandescent bulbs. According to ENERGY STAR®, CFLs can save you energy and money. There are many types of CFL bulbs available, such as floodlights and dimmable bulbs. When a CFL burns out, remember to recycle it.
Q: I use CFLs in several fixtures in my home, but they do not work well in fixtures with a dimmer switch. Is there a CFL made specifically to work in fixtures equipped with dimmers?
A: Only specially designed CFLs will work in dimmable fixtures. Check the packaging to make sure the CFL is appropriate for the fixture.
Q: Can CFLs be used in recessed can lighting?
A: Only specially designed CFLs will work in recessed fixtures. Check the packaging to make sure the CFL is appropriate for the fixture.