Re: Blue LED with no emission beyond 480 nm

"Steve" <steve@[EMAIL PROTECTED]
> wrote in message 
news:v2clc4tbttcr0rg3h0cp8qpgsit63gr7cv@[EMAIL PROTECTED]
> I'm seeking an LED with no emission beyond  (longer than) 480 nm.
> It's best if it was eye-safe so as little UV emission as possible is
> desired (> 400 nm ?).  The few blue led's I've come across with peak
> or dominant wavelengths of 430 nm have very wide spectra extending
> beyond 480 nm.
>

Construct a cct that will turn the LED off when a freq > 480nm is reached
;)