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WattThe amount of electricity a light
bulb uses to produce light
=
It’s not an indication of brightness!
Lighting Terms
11watt
s
40watt
s
Incandescent
(Watts)
Minimum Light Output
(Lumens)
Compact Fluorescent
(Watts)
*Energy Star
40 450 9 to 13
60 800 13 to 15
75 1,100 18 to 25
100 1,600 23 to 30
150 2,600 30 to 52
How Much Light Do I Need?
Incandescent◦ Inexpensive◦Good color◦Work well with
devices◦Produce heat◦Short life
Light Bulb Types
Fluorescent◦Efficient◦Long life◦Many colors, types and sizes◦Quiet electronic ballasts◦Contain mercury
Light Bulb Types
Compact Fluorescent Lights (CFLs)◦Standard bases◦Efficient◦Long life◦Quick start time◦Color◦Brightness
Light Bulb Types
Solid State – LED◦Most efficient◦Very long life◦Colored light ◦Expensive◦Not readily available for residential use
Light Bulb Types
13-Watt Spiral CFL
60-Watt Incandescent
Initial Purchase $3.77 $0.27
Replacement Costs(estimated 7 bulbs)
$0.00 $1.89
Energy Costs (based on $0.10/kWh, 8,000-hour bulb)
$12.00 $48.00
Total Cost $15.77 $50.16
Estimated Savings $34.39
Using a GE Energy Smart® bulb vs. standard incandescent bulbhttp://www.gelighting.com/na/home_lighting/products/energy_smart.htm
How Much Can I Save?
Starting time◦ Quick turn on time◦ “instant on”
Color◦ Wide variety
Bulb position Outdoor use
There are large differences in light, cost and turn-on time among different manufacturers.
CFL Issues
Flicker
Health effects◦ Ultraviolet (UV) radiation
Mercury◦ Disposal
http://www.epa.gov/bulbrecycling
◦ Broken bulbs
CFL Issues
http://www.epa.gov/mercury/spills/index.htm
Type of Bulb Incandescent Fluorescent(CFL)
Power Used (watts) 60 13
Light Output (lumens)
800 800
Lifetime (hours) 750 – 1,000 6,000 – 15,000
Lifecycle Cost* $40 $10
What’s the Difference?
*Based on a 6,000-hour CFL, a 1,000-hour incandescent, use of 3 hrs/day, 11.09¢/kWh electric rate, $3.00 CFL and $0.50 Incandescent.
A single 20-watt CFL used in place of a 75-watt incandescent will save about 550 kilowatt-hours over its lifetime.
That savings represents nearly 500 pounds of coal not burned, which means1,300 lbs. of carbon dioxide &20 lbs. of sulfur dioxide are not released
Environmental Impact
Voluntary Action◦ Public education on CFLs
Incentives◦ Subsidies and/or give-aways
Legislation◦ Some counties have banned incandescents◦ U.S., Australia and Canada set efficiency
standards◦ The Energy Independence and Security Act of
2007 (“The Energy Bill”)
Light Bulbs and the Law
All bulbs must use 30% less energy than today’s incandescent bulbs by 2012-2014◦ 2012 Phase out 100W bulbs ◦ 2014 End with 40W bulbs ◦ 2020 All must be 70% more efficient
(= to today’s CFLs) Lighting ~ 20% average household’s energy
bill This bill could cut nation’s electric bill by
more than $10 billion a year Many types of incandescent bulbs are
exempt
The Energy Bill
Energy Star Web Guidehttp://www.drmediaserver.com/CFLGuide/index.html
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