1. BY: Ally Hallberg

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

3.  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. 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. Light BulbTime Mins Electricity Usage KW Usage per min % total energy used CFL42040.009533.33 incandescent light bulbs 38080.021166.67

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

13. References  I would like to thank these websites http://www.communicationagents.com/chris/2007/05/02/caution_about_com pact_fluorescent_lighting_cfl.htmhttp://www.communicationagents.com/chris/2007/05/02/caution_about_com pact_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_cflshttp://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/brightideahttp://www.responsiblebynature.com/brightidea Retrieved Sept 26 2009 (Excel Energy) Bright Idea http://www.treehugger.com/files/2007/08/green-basics-compact-fluorescent- lightbulbs.phphttp://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.) Cohttp://en.wikipedia.org/wiki/Compact_fluorescent_lampWikimedia Foundation, Inc.