Renfro
Well-Known Member
It has to do with the shape of the arc inside the arc tube. They are designed for the arc to be in one direction and the arc tube orientation is really whats important. They can design an arc tube to work well with gravity working from a given angle. We start moving the lamp around or running it at an angle thats not intended and we disrupt the arc, at best it runs but the output is not optimal.
