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Fluorescent bulbs

  1. Jan 16, 2010 #1
    Wikipedia seems to do a good general job of explaining fluorescent light bulb technology at

    Lots of technology hidden in a fluorescent bulb! But I did not see any explanation of how, say, a 13 watt compact fluorescent lamp (CFL) differs from an 18 watt...or for a full sized fluorescent,either...

    It looks like the two basic components affecting light output are the gas and a fluorescent coating inside the bulb...but what is done to get more or less light from a given physical sized bulb?? Are both components varied or one or the other??
  2. jcsd
  3. Jan 16, 2010 #2


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    From the Wikipedia article,
    So, more current means more light.
  4. Jan 16, 2010 #3
    So, more current means more light.[/QUOTE]

    You may be right, but I don't see the logic in the quote nor in that section of the wikipedia article....I can see that in a negative resistance environment, i2 will likely rise more quickly than r will fall if the resistance decrease is linear...and perhaps that is the reason power and light increases.
  5. Jan 16, 2010 #4


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    Think about it. The electrons are being moved by the electrical potential and interact with the noble gas. The interaction by the electrons cause the gas atoms to make transitions causing emissions of UV. So the more electrons (current), the more interactions; hence more light.
  6. Jan 17, 2010 #5
    ok, that's the logic I wanted to confirm.....thanks...
  7. Jan 17, 2010 #6


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    Staff: Mentor

    Note that different wattages of CF bulbs are not the same physical size.
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