>I think it's the other way around.  Amorphous cells (brown in color, less
>expensive) work well only in full sun.  Their output falls off rapidly in
>cloudy conditions.  Crystalline cells (blue in color, more expensive),
>decrease in output more linearly, producing better power in less than
>full sun.

No, that's not the way it works. It is easy to get confused about it
though, because the output from amorphous cells is very low. However, if
you do an experiment with both types, and have enough extra amorphous cells
to make the same amount of current in full sun as a crystalline cell, then
add cloud cover, the crystalline cell will produce less current.

Note that solar calculators use amorphous cells because they will produce
current under more conditions.

I'm not pushing amorphous cells, I don't like them, they are very wimpy,
but if you are in a situation where you need solar power under extreme
conditions without direct sunlight, or for the most number of hours per
day, they are the way to go. However you will need a lot of them.

Cheers,
Bob