LEDucation: An introduction to LED's & Lighting Fundamentals for Interior Designers/Architects by Paul Donegan MSc Light & Lighting

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  • 7/29/2019 LEDucation: An introduction to LED's & Lighting Fundamentals for Interior Designers/Architects by Paul Donegan MSc Light & Lighting

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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)

    - -

    Efficacy 40-70lm/w10,000 hours (T5 25,000)

    - -

    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?

    Robus Tour Option

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