Milwaukee wasn't the first American Association club to go electric - in 1931, the Columbus Redbirds had installed lights, and the following year they outdrew their parent Cardinals 310,000 to 279,000. When Redbirds General Manager Larry MacPhail jumped up to the Cincinnati Reds after the 1933 season, he dragged the big leagues into the Electric Age.
The first major league game played under floodlights was at Crosley Field on May 24, 1935 as 20,422 fans watched the Reds down Philadelphia Phillies, 2-1. As with Columbus, night baseball was a success in Cincy - the seven night games averaged 18,620 spectators, far and above the 4,700 average the remaining 69 home games drew.
The Brews had already jumped on the electric bandwagon, working on illuminating the Orchard, and less than two weeks later were ready to play their first game under the floodlights:
(click for full Milwaukee Journal article)
Borchert Field's unusual layout, wedged in between 7th and 8th Streets, forced some creative work from the lighting crew. The outfield standards were in fair territory and their infield counterparts were placed in front of the grandstands, as you can see in this 1940s promotional photo:
As if the Orchard's sightlines hadn't been bad enough....