BY: Ally Hallberg

1. Light Bulbs BY: Ally Hallberg

2. Big Question • Will compact fluorescent light bulb (CFL) save energy over incandescent light bulbs?

3. HYPOTHESIS • If we replace five incandescent light bulbs with CFL in our house then we will not save more than 10% energy over a time period.

4. FACTS FROM RESEARCH • CFL’s use less electricity • CLF’s work longer • CLF’s contain mercury which makes it harder to throw away • CFL’s use about 75% energy

5. Materials • Materials Needed • Note Book • Clock • Step Ladder • Five 100 watt soft white incandescent light bulbs • Five 23 watt soft white fluorescent light bulbs • 23 watt is the 100 watt equivalent to incandescent • House electricity usage meter

6. Step by step • Directions • Using the step ladder replace five light bulbs with the fluorescent light bulbs • Turn off all appliances that use household electricity. For examples, Television, Clocks, Computer, Furnace • Turn on the five fluorescent light bulbs • Go outside and write down the exact time and reading on the electricity meter • Wait four hours • Turn off the five fluorescent light bulbs

7. Step by step Cont • Go outside and write down the exact time and reading on the electricity meter • Using the step ladder, replace the five fluorescent bulbs with incandescent bulbs • Turn on the five incandescent light bulbs • Go outside and write down the exact time and reading on the electricity meter • Turn off the five incandescent light bulbs • Go outside and write down the exact time and reading on the electricity meter

8. Control/ Variables • The control group was CFL • Test groups’ Variable was incandescent light bulbs

9. Observation for Experiment After seven hours with 5 CLF’s the meter show the house used 4 kw and it was very very bright After 6 hours and 20 minutes the incandescent light bulbs used 8 KW and wasn’t so bright

10. Data • After measuring the electricity used from both bulbs the CFLs did use less.

11. Analysis of data • The CFL’s used approximately ½ of the electricity • CFL are brighter • CFL’s will save money because they last longer • CLF’s use ½ of the electricity of incandescent light bulb

12. Conclusion • That CFL’s do save electricity over incandescent light bulbs • There is a big difference between CFL’s and incandescent light bulbs • My Hypothesis was not supported

13. References • http://www.communicationagents.com/chris/2007/05/02/caution_about_compact_fluorescent_lighting_cfl.htm Retrieved Sept 26 2009 (Robin Goods Communication Agents Initiative) Caution About Compact Fluorescent Lighting • http://www.energystar.gov/index.cfm?c=cfls.pr_cfls Retrieved Sept 26 2009 (United States Department of Energy) Retrieved Sept 26 2009 Compact Fluorescent Light Bulbs for Consumers • http://www.responsiblebynature.com/brightidea Retrieved Sept 26 2009 (Excel Energy) Bright Idea • http://www.treehugger.com/files/2007/08/green-basics-compact-fluorescent-lightbulbs.php Retrieved Sept 26 2009 (Colin Dunn, Treehugger.com) • http://en.wikipedia.org/wiki/Compact_fluorescent_lamp (Colin Dunn, Treehugger.com) (Wikimedia Foundation, Inc.) Co • I would like to thank these websites