LED Status_2013Syed Akhtar Ali

Visiting Professor Energy Management IoBM

Karachi,PakistanEnergy Consultant

proplanassociates@gmail.com

What is an LED?

Light Emitting Diode

Colour

White

Anatomy of an LED

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

Currently Most LED’s Are Directional

But not so good for applications better suited to omni directional lamps

LED Light Distribution

Some LEDs have diffusion lenses to spread out the light, or don't have the reflective cap.

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

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

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)

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

Myth #1LED’s Create No Heat

Lighting Trend

LED ATTRIBUTES

Led Attributes

Eis of Lamps

LED Prices

LED MARKET PENETRATION IN THE U.S.

LED Applications

Most Efficacious LED Products

Future Advances in LED Technology

A-type Lamps

Directional Lamps_definition

Indoor Luminaire_Definition

Lamps vs Luminaire

• LAMPS:60% Installations and 20% Energy Consumption

• Luminaire:37% installation and 80% consumption

Indoor Luminaire Potential

Troeffer

LED Troffers