MOTM

>  My favorite blue LEDs (and also proper
>primary green LEDs) are manufactured by Nichia.

I have no idea which LED's Lexicon uses, but they work fine.

>The Nichia part numbers (for blue) are the NSPB320BS (3mm round) and
>NSPB520S (5mm round) - these are not the highest output (these are
>"only" 700mcd) but that's already way too much for a panel indicator!

I have a Princeton Tec that has a single LED that makes a difference 
outside in broad daylight.  So yes, not all LED's are suitable as 
panel indicators!!  The 320 was designed as an LFO, not a diving 
beacon.

>I think Dave has the right idea about putting blue LEDs into the Lumex
>lenses - a diffused white lens would solve the cone angle problem.

That is great idea, but imho, not worth the effort.  I haven't 
decided what color to use for the 800's.  I'm thinking I could use a 
two-color LED -- tie the red to gate, and the green to the envelope :)