1. LED Status_2013
Syed Akhtar Ali
Visiting Professor
Energy Management IoBM
Karachi,Pakistan
Energy Consultant
proplanassociates@gmail.com

2. What is an LED?
Light Emitting
Diode
Colour
White

3. Anatomy of an LED

4. 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

5. Currently Most LED’s Are Directional
But not so good for applications better
suited to omni directional lamps

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

7. Color Rendering...
Color Rendering Index ( CRI )
How Natural And Normal
Do People And
Things Appear Under
Artificial Light?
CRI Scale goes from: 0 - 100,
with 100 being the best CRI

8. Color Rendering Index ( CRI )
The Perfect Light Source...
“The SUN”
100
90
70
DAYLIGHT MH ( 90 )
CMH (85+)
FLUORESCENT ( 60+ to 92 )
60
STD. METAL HALIDE ( 65-70 )
DELUXE LUCALOX ( 65 )
50
COATED MERCURY ( 50 )
40
POORER
Perfect
Color
Rendering
BETTER
80
INCANDESCENT / HALOGEN (100)
30
20
10
0
LUCALOX, HPS ( 22 )
CLEAR MERCURY ( 15 )
LPS ( 0 )

9. 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)
_______
Watts

10. Common Colour Temperatures
Approx Temp.
8500K
6500K
6000K
4500K
4000K
3000K
2500K
2000K
Light Source
Blue Sky
Daylight Fluorescent Lamp
Clear Mercury Lamp
Clear Metal Halide Lamp
Cool White Fluorescent Lamp
Halogen Lamp, WW Fluorescent
40 Watt Incandescent Lamp
Candle, HP Sodium Lamp

11. Myth #1
LED’s Create No Heat

13. Lighting Trend

15. LED ATTRIBUTES

16. Led Attributes

30. Eis of Lamps

34. LED Prices

35. LED MARKET PENETRATION IN THE
U.S.

36. LED Applications

37. Most Efficacious LED Products

38. Future Advances in LED Technology

40. A-type Lamps

41. Directional Lamps_definition

47. Indoor Luminaire_Definition

48. Lamps vs Luminaire
• LAMPS:60% Installations and 20% Energy
Consumption
• Luminaire:37% installation and 80%
consumption

49. Indoor Luminaire Potential

52. Troeffer

54. LED Troffers