Quote Originally Posted by Steve Smith View Post
Use equal quantities of blue and green LEDs and vary the times of each to change grades.

http://www.apug.org/forums/forum43/6...ht-source.html

http://www.apug.org/forums/forum43/7...ht-source.html


Steve.
Yes. Including the limitation in max. achievable contrast with blue LED's. A continuous spectrum has the advantage that the spectrum simply goes on and one only has to filter and extend exposure...