[time-nuts] Conducting Bench Top Material

Chuck Harris cfharris at erols.com
Sat Jan 30 07:13:54 UTC 2010


The LED lamps that I have seen use UV LED's with a fluorescent material
in the LED to make it appear white.  I don't know what the spectrum looks
like, but to my eye it appears to be pretty white.

-Chuck Harris

Magnus Danielson wrote:
> Poul-Henning Kamp wrote:
>> In message <6755CB2A-9566-4F35-818E-38471BE6528F at cq.nu>, Bob Camp writes:
>>
>>>> And now "they" are trying to do away with edison bulbs. I hope
>>>> the LED equivalents are better, because the CF bulbs seem to last
>>>> less in most home apps.
>>
>> Speaking of LED lamps: I want to point out that at least over here
>> IKEA has a wonderful little LED lamp for the worktable.
>>
>> It's a single 3W white led, at the end of a 55cm long (that's 20" for
>> the imperialists amongst us) "swan-neck".
> 
> LED lamps... the one thing I keep being annoyed about is the aspect of 
> having three peaks of relative narrow spectrums rather than the normal 
> continuous spectrum mainly being that of the temperature signature.
> 
> Anyone out there looking at the frequency spectrum of these low-energy 
> lamps?
> 
> Colour response from few-spike lamps is not really the same than from 
> continuous spectrums.
> 
>> I use one for my small CNC-mill:
>>
>>     http://ing.dk/uploads/society/content/232.png
>>
>> It's called "JAN SJÖ" here, not sure if they use that name in other
>> geographies.
> 
> IKEA has a habit of giving all their products Swedish names for their 
> products... worldwide. It's part of their trademark so to speak.
> 
> Cheers,
> Magnus
> 
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