led status pakistan
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LED Status_2013Syed Akhtar Ali
Visiting Professor Energy Management IoBM
Karachi,PakistanEnergy Consultant
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What is an LED?
Light Emitting Diode
Colour
White
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Anatomy of an LED
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LED Basic Components
LED chips are made of silicone (like computer chips) then mounted in a “package” that has some electrical leads and sometimes a heat sink
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Currently Most LED’s Are Directional
But not so good for applications better suited to omni directional lamps
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LED Light Distribution
Some LEDs have diffusion lenses to spread out the light, or don't have the reflective cap.
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Color Rendering...Color Rendering Index ( CRI )
How Natural And NormalDo People And
Things Appear UnderArtificial Light?
CRI Scale goes from: 0 - 100,with 100 being the best CRI
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Color Rendering Index ( CRI )
STD. METAL HALIDE ( 65-70 )DELUXE LUCALOX ( 65 )
100
90
80
70
60
50
40
30
20
10
0 LPS ( 0 )
CLEAR MERCURY ( 15 )
LUCALOX, HPS ( 22 )
COATED MERCURY ( 50 )
FLUORESCENT ( 60+ to 92 )CMH (85+)
INCANDESCENT / HALOGEN (100)
DAYLIGHT MH ( 90 )
PO
OR
ER
B
ET
TE
R
The Perfect Light Source...“The SUN”
PerfectColor
Rendering
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Watts
_______
Efficiency: Lumens, Watts, & Efficacy
Lumens: total “light” Watts: total power Efficacy: how much light for the power
(lumens per watt, LPW)(similar to miles per gallon)
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Common Colour Temperatures
Approx Temp. Light Source
8500K Blue Sky6500K Daylight Fluorescent Lamp6000K Clear Mercury Lamp4500K Clear Metal Halide Lamp4000K Cool White Fluorescent Lamp3000K Halogen Lamp, WW Fluorescent2500K 40 Watt Incandescent Lamp2000K Candle, HP Sodium Lamp
Common Colour Temperatures
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Myth #1LED’s Create No Heat
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Lighting Trend
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LED ATTRIBUTES
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Led Attributes
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Eis of Lamps
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LED Prices
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LED MARKET PENETRATION IN THE U.S.
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LED Applications
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Most Efficacious LED Products
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Future Advances in LED Technology
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A-type Lamps
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Directional Lamps_definition
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Indoor Luminaire_Definition
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Lamps vs Luminaire
• LAMPS:60% Installations and 20% Energy Consumption
• Luminaire:37% installation and 80% consumption
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Indoor Luminaire Potential
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Troeffer
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LED Troffers
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