ENERGY CONSERVATION = FISCALLY CONSERVATIVE <ul><li>A COMPARISON OF COMPACT FLUORESCENT AND INCANDESCENT BULBS </li></ul><...
LIGHTING <ul><li>What type of light do you use in your home? </li></ul><ul><li>How much do you spend on lighting in your h...
STUDY OBJECTIVES <ul><li>$$$$ = the fiscally conservative conservationist </li></ul><ul><ul><li>Having heard that compact ...
STUDY OBJECTIVES <ul><li>We set out to find </li></ul><ul><ul><li>The difference in kilowatt hour (kWh) consumption betwee...
LIGHTING <ul><li>The typical household averages an estimated 25, 40-watt incandescent light bulbs*  </li></ul><ul><ul><li>...
STUDY METHODS <ul><li>To determine the difference in kWh consumption we: </li></ul><ul><ul><li>Searched the web to find a ...
STUDY METHODS <ul><li>To determine the difference in cost between the two bulbs we: </li></ul><ul><ul><li>Located the chea...
STUDY METHODS <ul><li>To determine when the compact fluorescent would be more cost effective than the incandescent bulb we...
LIGHTING RESULTS <ul><li>The 40-watt incandescent is slightly less bright than the 11-watt compact fluorescent </li></ul><...
LIGHTING RESULTS <ul><li>The 40-watt bulb has an estimated lifespan of 1000 hours </li></ul><ul><li>The 11-watt compact fl...
RESULTS:  CONSUMPTION <ul><li>KWH CONSUMPTION COMPARISON: </li></ul><ul><ul><li>per 1000 hours </li></ul></ul><ul><ul><ul>...
RESULTS:  CONSUMPTION <ul><li>Extrapolated over the lifespan of the compact fluorescent bulb (15000 hours)… </li></ul>
RESULTS:  CONSUMPTION <ul><li>Over the lifespan of the compact fluorescent bulb </li></ul><ul><ul><li>15 incandescent bulb...
RESULTS:  COST <ul><li>COST $$$ </li></ul><ul><ul><li>The 40W incandescent bulb costs roughly $ 0.84/bulb </li></ul></ul><...
RESULTS:  COST <ul><li>With 15 incandescent bulbs lasting as long as 1 compact fluorescent… </li></ul><ul><ul><li>$0.84*15...
RESULTS:  COST <ul><li>FISCALLY SOUND </li></ul><ul><ul><li>Between two and three 40W incandescent bulbs expire and the co...
COST:  ENERGY CONSUMPTION <ul><li>At the current 11.3 cents/kWh in Petersburg: </li></ul><ul><ul><li>Over 1000 hours </li>...
COST:  ENERGY CONSUMPTION <ul><li>With the purchase price of </li></ul><ul><ul><li>0.84/bulb for the 40W incandescent </li...
FISCALLY AND ENVIRONMENTALLY CONSERVATIVE
FISCALLY AND ENVIRONMENTALLY CONSERVATIVE <ul><li>Back to our  estimated 25 bulbs per household… </li></ul>
FISCALLY AND ENVIRONMENTALLY CONSERVATIVE
FISCALLY AND ENVIRONMENTALLY CONSERVATIVE <ul><li>A household that currently uses 25, 40W incandescent bulbs </li></ul><ul...
CONCLUSIONS <ul><li>In spite of the initial high purchase price </li></ul><ul><ul><li>Brighter compact fluorescent bulbs p...
CONCLUSIONS - SO SIMPLE? <ul><li>If you do not leave a compact fluorescent bulb on for at least five minutes </li></ul><ul...
CONCLUSIONS - SO SIMPLE? <ul><li>Compact fluorescent bulbs contain small amounts of mercury </li></ul><ul><ul><li>They nee...
references <ul><li>Jim Nelson, Petersburg Municipal Utility </li></ul><ul><li>www.energystar.gov/index.cfm?c=cfls.pr_cfls ...
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LIGHTING_ENERGY_CONSERVATION

  1. 1. ENERGY CONSERVATION = FISCALLY CONSERVATIVE <ul><li>A COMPARISON OF COMPACT FLUORESCENT AND INCANDESCENT BULBS </li></ul><ul><li>BY JONI JOHNSON, PETERSBURG MAT STUDENT </li></ul>
  2. 2. LIGHTING <ul><li>What type of light do you use in your home? </li></ul><ul><li>How much do you spend on lighting in your home? </li></ul><ul><li>If you could save, would you? </li></ul>
  3. 3. STUDY OBJECTIVES <ul><li>$$$$ = the fiscally conservative conservationist </li></ul><ul><ul><li>Having heard that compact fluorescent bulbs save energy, and having heard that they cost more money… </li></ul></ul>
  4. 4. STUDY OBJECTIVES <ul><li>We set out to find </li></ul><ul><ul><li>The difference in kilowatt hour (kWh) consumption between the two bulbs </li></ul></ul><ul><ul><li>The different in cost between the two bulbs </li></ul></ul><ul><ul><li>When, and if, over the life of the two bulbs the compact fluorescent would be more cost effective than the incandescent bulbs </li></ul></ul>
  5. 5. LIGHTING <ul><li>The typical household averages an estimated 25, 40-watt incandescent light bulbs* </li></ul><ul><ul><li>Therefore we selected 40-watt bulbs as our base for this study </li></ul></ul><ul><ul><ul><ul><li>*(sampled from four integrated </li></ul></ul></ul></ul><ul><ul><ul><ul><li>science students’ homes, so not </li></ul></ul></ul></ul><ul><ul><ul><ul><li>representative) </li></ul></ul></ul></ul>
  6. 6. STUDY METHODS <ul><li>To determine the difference in kWh consumption we: </li></ul><ul><ul><li>Searched the web to find a trustworthy source of </li></ul></ul><ul><ul><ul><li>Lumens </li></ul></ul></ul><ul><ul><ul><li>Watts (W) </li></ul></ul></ul><ul><ul><ul><li>Bulb lifespan in hours </li></ul></ul></ul>
  7. 7. STUDY METHODS <ul><li>To determine the difference in cost between the two bulbs we: </li></ul><ul><ul><li>Located the cheapest supplier for both bulb types </li></ul></ul><ul><ul><li>Contacted the Petersburg Utility for current kWh rates </li></ul></ul>
  8. 8. STUDY METHODS <ul><li>To determine when the compact fluorescent would be more cost effective than the incandescent bulb we: </li></ul><ul><ul><li>Combined the above two methods and calculated away… </li></ul></ul>
  9. 9. LIGHTING RESULTS <ul><li>The 40-watt incandescent is slightly less bright than the 11-watt compact fluorescent </li></ul><ul><ul><li>505 lumens compared to 660 lumens, respectively </li></ul></ul>
  10. 10. LIGHTING RESULTS <ul><li>The 40-watt bulb has an estimated lifespan of 1000 hours </li></ul><ul><li>The 11-watt compact fluorescent has an estimated lifespan of 15000 hours </li></ul>
  11. 11. RESULTS: CONSUMPTION <ul><li>KWH CONSUMPTION COMPARISON: </li></ul><ul><ul><li>per 1000 hours </li></ul></ul><ul><ul><ul><li>The 40W incandescent bulb consumes 40 kWh </li></ul></ul></ul><ul><ul><ul><li>The 11W compact fluorescent bulb consumes 11 kWh </li></ul></ul></ul>
  12. 12. RESULTS: CONSUMPTION <ul><li>Extrapolated over the lifespan of the compact fluorescent bulb (15000 hours)… </li></ul>
  13. 13. RESULTS: CONSUMPTION <ul><li>Over the lifespan of the compact fluorescent bulb </li></ul><ul><ul><li>15 incandescent bulbs have been used </li></ul></ul><ul><ul><li>600 kWh have been consumed by the incandescent bulb as opposed to 165 kWh by the compact fluorescent </li></ul></ul>
  14. 14. RESULTS: COST <ul><li>COST $$$ </li></ul><ul><ul><li>The 40W incandescent bulb costs roughly $ 0.84/bulb </li></ul></ul><ul><ul><li>The 11W compact fluorescent bulb costs roughly $2.19/bulb </li></ul></ul>
  15. 15. RESULTS: COST <ul><li>With 15 incandescent bulbs lasting as long as 1 compact fluorescent… </li></ul><ul><ul><li>$0.84*15 = $12.60 </li></ul></ul><ul><ul><li>As opposed to </li></ul></ul><ul><ul><li>$2.10 </li></ul></ul>
  16. 16. RESULTS: COST <ul><li>FISCALLY SOUND </li></ul><ul><ul><li>Between two and three 40W incandescent bulbs expire and the compact fluorescent pays for itself </li></ul></ul>
  17. 17. COST: ENERGY CONSUMPTION <ul><li>At the current 11.3 cents/kWh in Petersburg: </li></ul><ul><ul><li>Over 1000 hours </li></ul></ul><ul><ul><ul><li>A 40W incandescent costs $4.52 </li></ul></ul></ul><ul><ul><ul><li>A 11W compact costs $1.24 </li></ul></ul></ul>
  18. 18. COST: ENERGY CONSUMPTION <ul><li>With the purchase price of </li></ul><ul><ul><li>0.84/bulb for the 40W incandescent </li></ul></ul><ul><ul><li>2.19/bulb for the 11W compact </li></ul></ul><ul><ul><li>The cost per 1000 hours = </li></ul></ul><ul><ul><ul><li>$5.36 using the 40W incandescent </li></ul></ul></ul><ul><ul><ul><li>$3.43 using the 11W compact </li></ul></ul></ul>
  19. 19. FISCALLY AND ENVIRONMENTALLY CONSERVATIVE
  20. 20. FISCALLY AND ENVIRONMENTALLY CONSERVATIVE <ul><li>Back to our estimated 25 bulbs per household… </li></ul>
  21. 21. FISCALLY AND ENVIRONMENTALLY CONSERVATIVE
  22. 22. FISCALLY AND ENVIRONMENTALLY CONSERVATIVE <ul><li>A household that currently uses 25, 40W incandescent bulbs </li></ul><ul><ul><li>Would save </li></ul></ul><ul><ul><li> $932!!!! </li></ul></ul><ul><ul><li>Over 10,000 hours of use </li></ul></ul><ul><li>If they used compact fluorescent bulbs </li></ul>
  23. 23. CONCLUSIONS <ul><li>In spite of the initial high purchase price </li></ul><ul><ul><li>Brighter compact fluorescent bulbs pay for themselves within one year </li></ul></ul>
  24. 24. CONCLUSIONS - SO SIMPLE? <ul><li>If you do not leave a compact fluorescent bulb on for at least five minutes </li></ul><ul><ul><ul><li>The lifespan decreases signficantly </li></ul></ul></ul>
  25. 25. CONCLUSIONS - SO SIMPLE? <ul><li>Compact fluorescent bulbs contain small amounts of mercury </li></ul><ul><ul><li>They need to be disposed of at the proper facility </li></ul></ul><ul><ul><ul><li>Such facility you’re not likely to encounter in Petersburg </li></ul></ul></ul><ul><ul><ul><li>Hmmm… A dilemma. </li></ul></ul></ul>
  26. 26. references <ul><li>Jim Nelson, Petersburg Municipal Utility </li></ul><ul><li>www.energystar.gov/index.cfm?c=cfls.pr_cfls </li></ul><ul><li>http://energyhawk.com/lights/lights2.php </li></ul>

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