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A three-way incandescence light has two filaments: dim and medium. Every filament has a separate call on the bulb"s base. The brightest light level is provided by energizing both simultaneously. As soon as energized, each filament is thrust at the mains voltage, so applying that voltage to a standard LED pear will cause it to create its rated irradiate output.
You"ll probably find that (because the bulb"s basic is absent a contact), you"ll have an "on, off, on, off" pattern as you revolve the switch, rather of "dim, medium, bright, off" favor with a 3-way bulb.
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edited may 16 "11 at 19:46
answered may 16 "11 at 19:39
Niall C.♦Niall C.
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3 means LED bulbs lastly do exist now: http://store.earthled.com/products/switch-switch3-way-led-light-bulb
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answered Mar 20 "13 in ~ 15:56
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I am terribly i m really sorry to contradict two others replying to this question, however I great to set the record straight top top what may be a misunderstanding the the original question.
The concern is not around a 3-contact socket which call for a 3-contact pear (with two different filaments).
The manufacturer"s statement: "For incandescence bulbs only" or "Not because that compact florescent bulbs" go not typical that you need to avoid LED bulbs. The statement may simply median that the manufacturer failed to account newer LED bulbs...
A 3 method touch switch works by offering a lessened brightness level, however it offers a typical 1-brightness bulb. The achieves the cut-back in illumination by either reducing the voltage or "chopping" the wave kind (this is much more typical). One really cheap technique of dimming a solitary brightness bulb is to just skip every other 1/2 wave, as if a diode were placed in series. Yet this can create noticeable flicker and also can additionally cause compact florescent bulbs come overheat.
But come the point: The original writer asks if one can place one LED bulb into a desk lamp that has a 3-way touch control. The prize is: "It depends!...You must test it!" below is the reason...
First, LED lamps are typically marked dimmable or no dimmable. Together of 2014, most screw in replacements native the major brands (CREE, GE, Philips) space dimmable, if they room "equivalent 100 watts" or less. However, they call for a dimmer 보다 chops the top or trailing edge that the waveform. Together an example, they call for a much more expensive wall surface switch dimmer than the standard incandescent dimmer ($20 as opposed come $10 because that a comparable model). So component 1 of mine answer is to use only an LED bulb that is significant "dimmable".
But part 2 is trickier...
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If you purchased a desk lamp that says to use incandescent only, you need to test it through your LED lamp. In my Hampton Bay design 494 595 upright accent lamp, one brand the LED bulb shines only at complete brightness, however produces an stroked nerves hum in ~ the dim step. But another LED pear works just right, at fifty percent and full brightness. I would mention the bulb model, however they room store brands, and also Home Depot is known for switching providers or MFG series without transforming the SKU or version number. Therefore, these details would be short-lived.
The bottom line, is the (a) that is likely that the touch-dimming circuit is compatible with plenty of LED bulbs, and also (b) You need to still test the bulb to view if the dims. If it does (and if that does no make noise), it is really likely the the electronic devices in the bulb "realize" the a dimming circuit is gift used, and so the pear is cooperating by doing the dimming in ~ its own circuitry. Therefore, you have to be fine!