The improved
reflector has a bunch of rectangular shapes to it's shape. This as opposed to the more or less totally rounded old style
ellipsoidal reflector. Believe old and new are both
alzak aluminum, it's just a more optically pure
reflector set of angles based off something thought to be more efficient.
Agreed, as simple as opening up the
thumb screw and having a look. Might also have a look while there to make sure the lamp ain't touching the
reflector.
As for the difference in output between old style and new style.... there must be some. I have just never noticed the difference. Much less if a question of "can only use 575w / 115v or 750w / 115v lamps with improved reflectors", yea, they are designed for a slightly higher temperature perhaps. But what are you going to do replace and
throw out a perfectly good
reflector otherwise? Use it up until it goes bad the old style. The bad aluminum
reflector will as if rusting
gain a sort of white surface coating to it or even melt away.
With S-4 reflectors it's easy to tell a bad
reflector...
Anyone seen the confetti show while blowing the dust out of a
fixture once the
reflector fails?
I'm currently working on some 360 series and old Centuries. Their main ellipse reflectors are fine but their
gate reflectors are totally surface rusted. Guess this
reflector is not in older fixtures aluminum. Cheaper to just replace than attempt to re-surface. Never seen a totally surface rusted
reflector before.