12. A Brief History of Lighting
1901 1970 1995 2009
Fluorescent High Pressure First LEDs Production White
1879 Tube 1919 Late 1960’s Sodium used for general LED Lamp
Edison Light Sodium Metal Halide lighting. Exceeds 100 lm/W
Bulb Vapor Lamp
1985
2005
Compact-
White LED Lamp
Fluorescent
demonstrates
Fluorescent
Efficacy (70 lm/W)
12
13. Traditional Lighting Technology
Sodium
Incandescent Metal Halide
Vapor
(MH)
Fluorescent
High Pressure
Halogen (FL)
Sodium (HPS)
What do they all have in common?
13
20. Long Lasting
Typical Lifespan in Hours
50,000
45,000
40,000
35,000
30,000
25,000
20,000
15,000
10,000
5,000
0
Incandescent Halogen Compact Fluorescent Metal Halide High‐Pressure LED
Sodium
* 50k Hour Life based on LM‐70 test reports. Traditional lights are rated at 50%
average failure and not light output reduction.
20
26. Environmental Sustainability
Where are CFLs made? Not in the U.S., under strict
environmental regulation. CFLs are made in India
and China, where environmental standards are virtually
non-existent. 26
29. The Case for Conservation
A 50% reduction in lighting electricity usage = An 11%
reduction in global energy use.
In the US lighting electricity use for residential and
commercial facilities combined equaled 535 billion
kilowatt‐hours in 2009. 13.6% of overall electricity usage.
Even with a 28% adoption rate for CFL’s, US Households
throw away 5.5 million light bulbs a day.
29
33. The Case for Conservation
Lighting upgrades are consistently rated as one of
the top 1 or 2 recommended measures for
conservation by energy auditors.
Breakeven is generally under 36 months and often
under 12 months. Rebates and tax incentives can
reduce the breakeven point even further.
Assuming a 10% net profit margin, a business that
saves $1,000 a year in electricity has made the same
net affect as increasing revenue by $10,000.
33
36. National Case Studies
Replaced 25 parking lot lights.
58% reduction in electricity while
maintaining IESNA illuminance
recommendations.
44,000 kWh savings in electricity
per year – an equivalent of 30.4
tons of CO2 removed from the
environment.
$15k in electricity and $10k in
maintenance savings per year.
Project payback in 3 years.
36
38. Local Case Studies
The first city in the valley to install
LED streetlights on a wide scale.
Approx. 25% of city lights
converted.
Expected to reduce energy
consumption by 42% ‐ equal to 853
metric tons of greenhouse gas
emissions being removed from the
environment.
Funding made possible by an
ARRA grant.
38