1. Team 10 Device Comparison: Incandescent vs. Fluorescent Light

2. Team 10 Members  Emil Balceta  Dennis Obiang  Stanley Chuang

3. Introduction Incandescent Light  Created 120 years ago  Electricity heats up a tungsten wire filament  Temperature is heated to 2500ºK

4. Introduction cont. Fluorescent Light  Filled with Inert gases and mercury  The current excites the mercury  Requires a ballast

5. Replacement Guide

6. Comparison Incandescent vs. Fluorescent Light Bulbs 100 Watts Incandescent light bulb23 Watts Compact Fluorescent Number of Sockets 25 Burned per Day (hr) 4 Electricity Tax Rate: 11.20% Price per Killo Watts: $0.10 # of Bulbs Needed 2 bulbs per year 1 bulb per 7 years Purchase Price: $0.75 $11 Maintenance Cost: $37.50 per year $275 per 7 years Useful Life: 750 hrs 10,000 hrs Lumens Produced: 1690 1500 Source: U.S. Department of Energy, Energy Information Administration

7. Operating Cost Incandescent Light  Energy cost: $365 per year  2 bulbs needed a year per socket  Maintenance cost: $37.50  Total cost: $443.38

8. Operating Cost cont. Fluorescent Light  Energy cost: $83.95 per year  1 bulb needed over 7 years per socket  Maintenance cost: $275  Total cost: $368.35

9. Present Worth Cost Replacement cost Energy cost Operating cost Over a span of 6 years Discount rate: 3%

10. Total Present Worth of Cost 100W Incandescent light bulb  $3,316.47 23W Fluorescent light bulb  $729.77 ∆PWC value  $2586.70

11. Life Span Sensitivity

12. Energy Cost Sensitivity

13. Socket Quantity Sensitivity

14. Useful Life Sensitivity

15. Technology Difference Fluorescent bulbs outlast up to 13 incandescent or halogen bulbs. (Lights of America)

16. Cost Difference Fluorescents can typically save 8 to 12 times their cost over a span of 6 years. (Lights of America)

17. Temperature 90% of the energy consumed by an Incandescent bulb is wasted heat. (Lights of America)