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LEDucation
Paul Donegan 17th September 2013
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Overview of LEDucation
Introduction
Lighting Fundamentals
LED Lamps
Q&A
Robus Customer Centre
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Introduction
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FACT : Lighting a significant consumer of electricity
Lighting consumes 14% of all electricityconsumption within the EU and 19% of globalelectricity consumption.
International Energy Agency2008
Introduction
Why LED?
Lighting requires as much electricity as is
produced by all gas-fired generation worldwide
and 15% more than produced by either hydro ornuclear power.
International Energy Agency2006
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Introduction
Why LED?
LED theoretical limit: 683 lm/W
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Introduction - History
History Artificial Light
Sun only source oflight (moon)
400,000 yrs ago usedfire Peking man
80,000 yrs agoNeanderthal manlearnt to make fire
40,000 yrs ago oilused to illuminatecaves for painting
17th/18th Centuriescandles and oil
End of 18th CenturyGas in London
1800 First electriclight invented byHumphrey Davy not long lasting
1860 Joseph Swan longer lasting
1879 Thomas Edison
Carbon filament over 1500hrs
1910 First Dischargelamp invented
1939 Fluorescent,1951 more thanIncandescent in US
Modern day Fibre,
LED, CFL etc
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Lighting Fundamentals - What is Light?
Light is Invisible!
186,000 miles a second
Electromagnetic Radiation
Visible Light 380 760 nanometres
(waves/particles)
Below infra Red Above X-rays/Radio
Lumens/Lux
Overcast Daylight 10,00 Lux
Direct Sunlight 100,000 Lux
Highly illuminated interior 1000 Lux
Lamps not bulbs!
Why is the sky blue?
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Colour Spectrum
Colours Sir Isaac Newton(prism-refraction)
7 colours- violet, indigo,
Lighting Fundamentals Colour Spectrum
blue, green, yellow, orange& red.
RGB Equal = white
555nm = peak (son=489)
Additive RGB
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Light Colour Appearance
Warm/Cool etc
Lighting Fundamentals Colour Appearance
Correlated ColourTemperature (CCT)
Circadian Rhythms
Kelvin - Black Body Radiator!
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Colour Rendition (Ra)
Ability of light to render colours in theirtrue hue.
Lighting Fundamentals Colour Rendering
Colour rendering index (CRI) 1-100
CRI below Ra70 = Poor
CRI of Ra80 to 90 = Good 1b
CRI of Ra90 to 100 = Excellent 1a
Applications where above would beused?
8 test colours 1971 CIE; LEDs now reviewing
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LED Lamps How LEDs work
LED, consist of two types ofsemiconductors: one that
has an abundance ofelectrons (N-Type) and one
that has holes to receive
more electrons (P-Type)
PHOSPHOR
When an electrical current is
applied to the diode, electrons
travel from the N-type side to
the P-Type side. When theelectrons fall into one of the
holes in the P-Type side, they
release energy in the form of
Photons (light).
In most LEDs the light that is
emitted is BLUE and converted
to white light by passingthrough a phosphor-coating;
similar to how fluorescent light
is made
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LED Lamps Myth 1 LEDs produce no heat
Beam little heat - - - Heat controlled by heatsink
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Lighting Fundamentals Lamps
Incandescent
Banned -60w
Halogen
20w 50w
Tungsten Halogen
20w 50w
CFL
9w 42w
Metal Halide
20w 1000w
Efficacy 10lm/w1000hrs
Efficacy 15lm/w2000 hours
Efficacy 25lm/w5000 hours (ES)
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Efficacy 40-70lm/w10,000 hours (T5 25,000)
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Efficacy 70-90lm/w15,000 hours
LED
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LEDCHROIC
LED Lamps Spotlight Replacements
R250RGU-WW
240 LumenWarm/Cool White,
Regular Size,
GU10 Lamp, 4W,
non-dim
240 Lumen Warm/Cool White, GU10
Lamp, 4.5W
dimmable
R260GUD-WW R580SDDLM-WW
R580SDDLM-CW
560 Lumens
10W
dimmable
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LED Lamps Standard Replacements
4W250 lumens
= 25w
2700k
20 years
10.5W
806 lumens
= 60w
2700k
25,000 hrs
7W
470 lumens
= 40w
2700k
10 years
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LED Lamps - The future
OLED
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LED Lamps - The Power
200W OLYMPIC Flood light
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Thank you for your attention
Any questions?
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