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Type: Posts; User: drcampbell

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  1. Most bulbs do have their lumen output on the...

    Most bulbs do have their lumen output on the label these days. Unfortunately, "equivalent watts" [sic] is given a more-prominent position.
    I do make a point of asking for light bulbs by their lumen...
  2. A lampholder's capacity is based on how much heat...

    A lampholder's capacity is based on how much heat it can dissipate without its temperature rising enough to become a hazard. It doesn't know or care what kind of lamp is installed; all that's...
  3. The light-emitting diode itself is a DC device. ...

    The light-emitting diode itself is a DC device. It conducts in only one direction.
    But if you were to connect it to AC, (and limit the current) it would light up. It would light up on the forward...
  4. The semiconductor junction inside an LED is,...

    The semiconductor junction inside an LED is, indeed, a DC device that operates on two or three volts.

    Converting 120 or 277 volts AC to 2 or 3 volts DC is usually accomplished with a switching...
  5. If the lampholder's marked "Maximum 60 Watts",...

    If the lampholder's marked "Maximum 60 Watts", you can put up to a 60-watt bulb in it, regardless of what kind of bulb it is. That said, it only assures that the lampholder won't overheat. A CFL or...
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