USB Stuff

[Chuck Guzis]

On 9/30/2005 at 11:58 PM ard at p850ug1.demon.co.uk wrote:

>Hmmm.. Fromt what I rememeber, white LEDs depend on a phosphor in the 
>package to get the white light (LED's being naturally a narrow-band 
>device). I would worry about the persistance of that phosphor, I think.

They do indeed--they're basically blue with a phosphor.  But the persistence is measured in nsec, so you'd have to be pretty fast to notice it:

http://www.knt.vein.hu/staff/schandaj/SJCV-Publ-2005/473.pdf

OTOH, changing for the sake of changing is silly.  Bob Pease did an article some time ago about replacement CFLs only made sense on applications where they're frequently used.  Otherwise, the power savings doesn't yeild a sufficient return on investment.  

Cheers,
Chuck