Homebrew PCBs

Steve wrote:

>It seems to me someone calculated all this in the past and it came out
>to taking a ridiculously long time to expose a board this way.
>
>Steve Greenfield
>  
>
  Heard that, off hand most generally over estimate an LED's output many 
times as compared to other light sources..  A 100W lightbulb is equal to 
about 1000-1500 average 5000 or 10000 MCD white LEDs, and the factor is 
probably worse than that heading into the UV range..  When you start 
converting lumens and candles and working out the tiny angle for LEDs 
into the sphere for lumens it adds up quick.

Alan