1. Heat Given Off by Halogen, LED, and CFL light bulbs Group # Period Names:

2. Scientific Question

3. Variables IV: DV: Control Variables: (3)

4. Materials

5. Background (2-3 facts about each type of light bulb)

6. Sources (websites) 1. 2.

7. Hypothesis

8. Procedure

9. Data Table Title: __________________________ Type of Light Bulb Change in Temperature (°C) Trial 1Trial 2Trial 3Average

10. Graph www.chartgo.com

11. Analysis Lamp (A19) bulb technology Price per bulb (Est.) Lifespan (Hours) Watts (Varies by Mfr.) Lumens (Varies by Mfr.) 60-Watt Incandescent $0.41150060630-860 LED (60-Watt–Equiv.) $720,0008.5570-830 CFL (60-Watt–Equiv.) $310,00014740-840 Halogen (60-Watt Equiv.) $1.25110043565-750

12. Analysis: Cost and Energy Savings Cost per kW $.10/hr Watt  kW conversion = Cost for using each light bulb for 30 days assuming they run for 24 hours/day. A. CFL: B. Halogen: C. LED: D. How much money is saved using the LED bulbs?

13. Analysis Continued.. 1. How many of each type of light bulb would you need to purchase if you planned to use them 24hrs a day for 10years? 2. What is the cost of purchasing each type of light bulb? A. CFL: B. Halogen: C. LED:

14. Conclusion