[sdiy] Re: Other LED's

[Theo]

----- Original Message -----
From: Scott Juskiw <scott at tellun.com>
>
> I've had better luck with purple LEDs. I tried these Lumex ones, Digikey
#:
>
> 67-1830-ND LED T-5MM 410NM VIOLET WATER CLR
> 67-1831-ND LED T-5MM 380NM VIOLET WATER CLR
>
> The 380 nm variety is much more expensive than the 410 nm. I couldn't
> see much difference between them. I used a bunch of the 410 nm in my
> synth. Looks great.
>

Better start wearing sunglasses when that synth is on.
400nm is the top end of human sight, these LEDs are NOT purple but UV.
Well actually, 410 is still Violet but might hurt your eyes anyways!!
There is no single wave length for purple, its a mixture of (ultra) violet
and red.
You don't see much difference between the two types cause your eyes can't
handle the UV frequencies.
Its thanks to the red by product you see these leds shine at all.

The LEDs are actually much brighter than you perceive and harmful for your
eyes.
For this reason the 410nm LED are highly suspect, 380nm are guilty as hell.

Don't take my word on it, go ask a eye physician about looking at UV with
the naked eye.

Best regards,
Theo