An enthusiastic group of students tried their hand at lighting up bulbs with the Human Powered Generator last week. You can definitely see they are working much harder with the round, regular incandescent bulb. Sometimes it took several seconds before the bulb would begin to slightly glow and many students could not get the bulb to shine its brightest.
Working really hard to light up a regular bulb. |
Using a lot of energy to illuminate an incandescent bulb. |
When they switched to the energy efficient compact fluorescent bulb, it was much easier and lit up right away and stayed really bright as the students easily turned the handles. Some students even let go with one hand and continued to keep the CFL brightly lit with just one hand powering the generator. What a great visual for these kids.
The CFL lit up right away with a lot less energy. |
Instant illumination with very little effort. |
WOW! That was easy! |
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