[sdiy] Black LEDs (was: Re: Rapid Electronics Oktoberfest)

[Michael Zacherl]

On Oct 12, 2008, at 7:12 PM, Samppa Tolvanen wrote:

> On Sat, Oct 11, 2008 at 5:42 PM, John Mahoney <jmahoney at gate.net>  
> wrote:
>>
>> This would be problematic with normal human vision, but slightly  
>> less bad if
>> you could see ultraviolet. :-)
>>
>> International note: A "black light" is what Americans call a lamp  
>> that emits
>> UV. I don't know how universal that term is.
>>
>
> Well, here in Europe we are not as trendy - Square dancing isn't the
> latest thing and we might even go to so-called "Discoteque" to spend a
> night. I just wonder what those blueish and black tubes do.. I mean,
> other than emiting visually perceivable light? Colours becoming so
> vivid.. "a black light", right?


I'm not sure if I got you right, but in the seventies I always was  
very disappointed when my bright white shirt didn't get this darkish  
blue/violet colour  because that particular venue had no black lights  
installed. Take it as "fun stuff"  ... ;-)


--
hear the colours of noise: http://blauwurf.at