[BC] Clock display color

[Tom Spencer]

Uh, Mike?  Red's wavelength is *longer*, not shorter.  On the other 
hand, I didn't know about blue refracting; that explains why I have 
trouble seeing police cars' blue "takedown" lights... since I have 
astigmatism in both eyes (same angle, opposite sign)  And have always 
had trouble reading pencil-on-paper documents under mercury-vapor 
streetlights...  HPS streetlights were the greatest thing since sliced 
bread for this (long ago) paper boy.

Mike McCarthy wrote:
>
> I was told blue is hard to focus upon since the light refracts off the
> retina.  If you have an astigmatism, it's really hard to read.
>
> The green wavelength is critical and it takes much more energy as a reault
> to provide a similar light output. Red is far more efficient as a result
> of it's shorter lambda.

-- 
Tom Spencer