Greg Carlson describes the history, science and uses of LED lighting.

2. The Light Emitting Diode (LED)
Greg Carlson
Photo by: Mathieu Young
Nerd Nite Siem Reap

3. To be covered in the next 18 slides:
• History
• The Science of LEDs
• Why LEDs are so freakin’ awesome
• Cost
• 40 sec Case Study
• Common LED uses

5. Oleg’s Discovery
• 1920’s Russian radio technician and
inventor by the name of Oleg
Vladimirovich Losev
• Noticed that diodes used in radio receivers
emitted light when current was passed
through them
Oleg Losev

6. The Science
elec troluminescence

7. Why LEDs are so freakin’ awesome
Incandescent Compact Florescent LED
60W
1,200 hrs 8,000 hrs 50,000 hrs
• 60 watts • 14 watts • 7 watts
• $10 /year • $2.50 / year • $1 / year
• 85 BTUs • 30 BTUs • 3.4 BTUs
• Fragile • Fragile • Durable
• Mercury • Non-toxic
• Temp Sensitive • = freakin’
awesome

8. Why LEDs are so freakin’ awesome
Incandescent Compact Florescent LED
60W
1,200 hrs 8,000 hrs 50,000 hrs
• 60 watts • 14 watts • 7 watts
• $10 /year • $2.50 / year • $1 / year
• 85 BTUs • 30 BTUs • 3.4 BTUs
• Fragile • Fragile • Durable
• Mercury • Non-toxic
• Temp Sensitive • = freakin’
awesome

9. Why LEDs are so freakin’ awesome
Incandescent Compact Florescent LED
60W
1,200 hrs 8,000 hrs 50,000 hrs
• 60 watts • 14 watts • 7 watts
• $10 /year • $2.50 / year • $1 / year
• 85 BTUs • 30 BTUs • 3.4 BTUs
• Fragile • Fragile • Durable
• Mercury • Non-toxic
• Temp Sensitive • = freakin’
awesome

10. Pricing
50Watt Incandescent Replacement = $14.50

11. 40 sec. LED case study
• Portland, Oregon
USA
• Replace 13,000
Incandescent traffic
light lamps with LEDs
(150 watts each)

12. Project Highlights

13. Automotive Use

14. “Due to their smaller size, increased durability, increased lifespan and low
energy consumption, LED lighting systems will undoubtedly take over as the
primary lighting source in future vehicles.” -Audi Motors

15. Style…

16. Design
The Peace Bridge connecting Buffalo, NY,
USA and Ft. Erie Ontario, CA

18. Practicality
The MoonLight by Kamworks

19. Photo by: Mathieu Young

20. Photo by: Mathieu Young

21. Questions?
I Invented This