arc protection for your eyes is no joke
I went to school for welding, my eyes are more sensitive than others, after a long day of welding the arc will make you tired it isn't all about UV but also is about the intensity of the light and how you shade it, and what your eye color is. You can have permanent damage without the proper safety equipment in welding. All an HPS is , is an arc in a bulb, same deal.
Ocular damage is no joke ~ good post!
look into mirrored safety glasses based on eye type!