Whoa, was that ever contemplated... by anyone? I don't know what that would cost but I know you cannot go down to the local Home Depot and rent them. I would suspect it would cost several hundreds of thousands of dollars per game to do that. Is it really a no brainer for Purdue to pay that? How many more butts do you get in the stands? Even with all the excitement and probably a five figure number of fans showing up for Wisconsin, that was our least attended game. And I don't buy an argument for the weather since the Eastern Michigan game (noon start) was much worse.
If you throw away the Michigan, and OSU games as they are outliers and probably would be night games anyways with the networks paying, here are the breakdown of attendance the past two years based on time:
Noon - 4 games (IL & IN in 2017, EMU & Mizzou in 2018) - 48,474
3:30/4:00 - 3 games (MN in 2017, WI,, & Iowa in 2018) - 49,638
Night Games - 4 games (OH, NE in 2017 & BC, NU in 2018) - 45,393
The noon starts have actually had more folks at the games than the average afternoon/night game. Even if you add in OSU and UM average that is only 2,000 more fans per game. And Hazel's first year we averaged 49,000 per game.
I don't see any positive return on investment by putting temporary lights up for a 3:30 or night start. From a business perspective you either put in permanent lights or you let the networks pay for temporary lights. I think ultimately we made the right decision, but I don't think that was ever on the table. Keep in mind, at least one previous administration commented they liked the noon starts since it would curtail heavier drinking and additional security costs, so there was never a desire to go for the later starts.