percentage in day games than in night games.

In those days, an overwhelming majority of BYU's games were played during the day.

Yet half of BYU's loses during that period were at night (which I count as a game that at least ended after dusk).

BYU night loses (1979-85):
Indiana (1979)
New Mexico (1980)
Ohio State (1982)
Baylor (1983)
UCLA (1985)
UTEP (1985)

BYU day loses (1979-85):
UNLV (1981)
Wyoming (1981)
Georgia (1982)
Air Force (1982)
Utah State (1982)
Ohio State (1985)

Maybe we just need Kalani to keep coaching the team at night and the ghost of LaVell to coach the team during the day.