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Sorry, what are PAR bulbs?
Also, to ask a couple more questions, some of the television primers mentioned that WRGB, amongst others, experimented with mercury vapour lamps like the ones in the two pictures I've attached. The large housing is for a water-cooled jacket, and the principal drawbacks were the expense, the weight of the lamp, and that the jacket sometimes leaked. I think there were some issues, too, with the emission spectrum, which caused colours to be rendered into gray scale in unusual ways. Does anyone know how widely this kind of floodlighting was used?
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One Ruthie At A Time
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