1. LED Lights: The Future of Lighting Lowen Okamoto Mentor: Dan O’Connell Lowen Okamoto Mentor: Dan O’Connell

2. Reasons of Interest  Cost of energy is quickly increasing  Cut costs on electricity bill  Maintain green & sustainable environment  Cost of energy is quickly increasing  Cut costs on electricity bill  Maintain green & sustainable environment

3. Overview  What is an LED?  How do they work?  My Project on LED lights  Overall Benefits  What is an LED?  How do they work?  My Project on LED lights  Overall Benefits

4. How do they work?  Incandescent Bulb  Tungsten filament  Glows when red hot  Much energy is wasted  Incandescent Bulb  Tungsten filament  Glows when red hot  Much energy is wasted  LED  Light Emitting Diode  Small silicon crystals “doped” with phosphor atoms  Free electrons become excited producing photons  No heat output

5. My Project  Spectrophotometer  Typically used for filters  Fiber-optics emission Spectrometer  Displays readout of light spectrum  Spectrophotometer  Typically used for filters  Fiber-optics emission Spectrometer  Displays readout of light spectrum

6. Approach  Aperture to house different light sources  Allows for comparing different light bulbs on spectrometer  Aperture to house different light sources  Allows for comparing different light bulbs on spectrometer

7. Wasted energy Visible spectrum 400-780 nm 400 780

9. Light Source

10. 2.96 LUX / Watt 15.36 LUX / Watt 15.19 LUX / Watt 179.7 LUX / Watt

11. Light Source

12. Conclusion  Advantages  Less wasted energy  No hazardous materials  Superior Long Life  GREAT way to maintain green & sustainable environment  In the near future incandescent lighting methods will be phased out  Advantages  Less wasted energy  No hazardous materials  Superior Long Life  GREAT way to maintain green & sustainable environment  In the near future incandescent lighting methods will be phased out

13. Acknowledgements MAHALO TO: HNU TEAM Dan O’Connell Terry Born Richard Puga Chris Taylor Jeff Korcan Nathan Sabin Mary Liang Chad Sithar PROGRAM DIRECTORS Scott Seagroves Lani LeBron Lynne Raschke Lisa Hunter Also Thank You to Mark Hoffman The Akamai Internship Program is funded by the Center for Adaptive Optics through its National Science Foundation Science and Technology Center grant (#AST-987683) and by grants to the Akamai Workforce Initiative from the National Science Foundation and Air Force Office of Science Research (both administered by NSF, #AST-0710699) and from the University of Hawaii. MAHALO TO: HNU TEAM Dan O’Connell Terry Born Richard Puga Chris Taylor Jeff Korcan Nathan Sabin Mary Liang Chad Sithar PROGRAM DIRECTORS Scott Seagroves Lani LeBron Lynne Raschke Lisa Hunter Also Thank You to Mark Hoffman The Akamai Internship Program is funded by the Center for Adaptive Optics through its National Science Foundation Science and Technology Center grant (#AST-987683) and by grants to the Akamai Workforce Initiative from the National Science Foundation and Air Force Office of Science Research (both administered by NSF, #AST-0710699) and from the University of Hawaii.