On 2012-05-19, Edward A. Falk wrote:
On related note, I've discovered that my auto-darkening welding
helmet is not triggered by direct sunlight. How can that be?


They are designed for that, it is a feature, not a bug. The idea is to
NOT be triggered by sunlight, but to be triggered by welding
arcs. This is done for weldors who have to work outside.

Just get a old non-electronic helmet to look at the sun.

i