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Light Bulbs. BY: Ally Hallberg. Big Question. Will compact fluorescent light bulb (CFL) save energy over incandescent light bulbs?. 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. FACTS FROM RESEARCH.
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Light Bulbs BY: Ally Hallberg
Big Question • Will compact fluorescent light bulb (CFL) save energy over incandescent light bulbs?
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.
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
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
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
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
Control/ Variables • The control group was CFL • Test groups’ Variable was incandescent light bulbs
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
Data • After measuring the electricity used from both bulbs the CFLs did use less.
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
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
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