This document summarizes the benefits of LED lights compared to incandescent and fluorescent bulbs. LED lights are more energy efficient, produce less heat, and last significantly longer. They use semiconductor diodes to generate light with high efficiency, emitting 80-110 lumens per watt compared to 14 lumens/watt for incandescents and 60 lumens/watt for fluorescents. Widespread use of LEDs could reduce US electricity use for lighting by 1/3 by 2030, saving billions and eliminating greenhouse gas emissions equivalent to millions of cars.

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2. • Use light emitting diodes (LEDs)
to generate light.
• What are LEDs?
– LEDs are semiconductor diodes that
generate light when current flow from
positive to negative junction.
+ ‐
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3. • Green qualities of LED lights:
– High energy efficiency
– Non-toxic
– Reduced waste
• Excellent color quality
• LED light comes on instantly
• Emit less to no heat
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4. • Energy efficiency of lights
= Light output (lumens (lm)) / Electric power (watts (W))
• Higher the ratio, more energy efficient.
• L
Less power required t generate li ht output.
i d to t light t t
Type of Lights Energy Efficiency
LED Light 80 to 110 lm/W
Incandescent 14.2 lm/W
Fluorescent 60 lm/W
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5. • LED light most energy efficient
• With same light output, LED light bulb consume
output
– 87% less electricity than incandescent
– 45% less electricity than fluorescent
Incandescent
Fluorescent
LED Light
Electricity consumed
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6. • Reduce 1/3 of U.S. electricity use for lighting by 2030.
– Save 348 billion kilowatt hours
hours.
2008 Electricity Use 2030 Electricity Use
13.40% 4.47%
4 47%
Lighting Lighting
86.6%
86 6% Other 95.5%
95 5% Other
Oth
• 1/3 less electricity use = less power plants
– Eliminate 44 1000-megawatt power plants
• Less power plants = less greenhouse gas emissions
– Eliminate greenhouse gas emissions equivalent to 47 million cars.
Information provided by US Department of Energy (DOE)
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7. CO2
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8. • LED light reduce your electricity bills
• H
How much savings i electricity bill?
h i in l t i it
Based on $0.15 per kWh electricity rate and 35,000 hours operation (average life of
one LED light bulb)
Light Output LED Light Incandescent Electricity Bill
(Based on Bulb (from Green Electricity Bill Savings Using
incandescent with Supply)
pp y)
these wattage)
LED Light
Electricity Bill Bulb
25W $15 75
$15.75 $131 25
$131.25 $115.50
40W $26.25 $210.00 $183.75
60 W $36.75 $315.00 $278.25
100W $63.00 $525.00 $462.00
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9. • LED lights are non-toxic and recyclable.
• Fluorescent lamps contain mercury
– Mercury is highly-reactive, toxic heavy metal when inhaled or
highly reactive
ingested can cause damages to central nervous system, brain,
kidney, reproductive systems and even lead to death.
– Fluorescent lamp need to be disposed properly as hazardous waste.
– Compact fluorescent light bulb contain 3 to 5 mg mercury.
– Fluorescent tube light (4 foot long) contain 12 mg mercury
(4-foot mercury.
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10. • Longer operation:
– LED light bulb: Average 35 000 to 50 000 operating hours
35,000 50,000
– Incandescent light bulb: Average 1,000 operating hours
– Fluorescent light: Average 10,000 operating hours
g g g
• Reduce waste with longer operation:
– 1 LED light bulb last 35 times longer than incandescent and 3.5
times longer than fluorescent – Less LED light bulbs in landfill!
Hazardous
Waste
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11. Green Supply website:
http://www.agreensupply.com/pages/Green-Lighting-
%252d-LED-Light.html
Green Supply LED Light Products:
http://www.agreensupply.com/categories/LED-Light/
htt // l / t i /LED Li ht/
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12. Thank you!
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