Here's some clippings of a newspaper article about installation of mercury vapor ballfield lights at a hugh school football field in September 1972. My dad was a student there at the time, and remembers this.

Although the article doesn't say, I'm guessing these used 1,000W mercury vapor bulbs overdriven at 1,500W. I've read catalogs that talk about how this was a practice at the time. I don't know what the difference between the 60 foot "standards" and 100 ft "towers" are. Anyone recognize the fixture make or model from the picture?

1972 would probably still be in the time when 1000w MV lamps driven at 1500w would be used, especially for smaller fields. Light standard is another term for a light pole, it seemed to be more commonly used in the past.