> I'm having trouble remembering where to look for the 
> pieces of this,
> I'd appreciate any pointers.
>
> The problem is to find the minimum LED output to 
> illuminate the
> surface of a sphere to 1 lux at a given distance, with the
> complicating factor that the LED's pattern is not 
> symmetrical.

The problem is probably easy enough once fully stated.
As defined it sounds ambiguous.
Can you describe what's needed a bit more completely?

Do you want to spread the LED energy evenly over a whole 
sphere? / have a selected part at or above a certain level? 
/ .... ?

        Russell



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