As a retired film projectionist and theatre tech going back to the early sixties , I have to say I took a silent gasp when I saw your excellent , but to me , sad photos taken in the projection room . I am very familiar with those Peerless Projector arc lamps , usually baring the name of J Frank Brockless . Wow the memories . Carbon trim , and neg electrode adjustments to maintain that hard flat , probably 2 1/2 K. daylight balanced beam .
All to try to reproduce the lighting filmed at whatever shooting location , for whatever blockbuster movie was being projected down onto a white perforated screen , allowing the sound from the huge main speakers directly behind to bring the whole thing to life . Great stuff , hope I did not go on too much .
But a big thank you to you for sharing . Kind regards , Ray .