I've heard the answer to this somewhere, and the exact logic escapes me.....but I think it has something to do with the glare from the sun that can occur, especially when the fielders are facing a certain direction.
I would venture a guess that Rosenblatt Stadium likely faces towards either the northeast, east, or southeast, hence the fielders would likely be looking into the afternoon sun. I believe that keeping the lights on sometimes dull the effect of glare.
And, yes, a very compelling series. I wasn't thrilled at last night's result, especially when it looked to me like the runner going to first base in the 10th inning for Rice adjusted his path to the left, in line with the ball about to be thrown, but out of the baseline.
But, since LSU got knocked out, it's on more for the entertainment value.
Tom in NO (at MSY
"The criminal ineptitude makes you furious"-Bruce Springsteen, after seeing firsthand the damage from Hurricane Katrina