LED Lights The Future of Lighting Lowen Okamoto

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

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

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

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

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

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

Wasted energy Visible spectrum 400 -780 nm 400 780

Light Source

179. 7 LUX / Watt 15. 36 LUX / Watt 15. 19 LUX / Watt 2. 96 LUX / Watt Light Source

Light Source

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

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 Le. Bron 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.