"illuminating insight" is a correct and usable phrase in written English.
You can use it when you want to refer to a new or particularly insightful understanding of a topic. For example: His lecture provided an illuminating insight into the complexities of medieval politics.
Working as a psychiatric nurse gave me an illuminating insight into dysfunctional families.
You keep waiting for some illuminating insight into how kitsch relates to faith, but it never comes.
"Maybe if I'd played all the games this season we'd be 12 points clear," he joked afterwards, before offering a more illuminating insight into his art.
Mr. Coster, in particular, is excellent as Teddy Lloyd, the dashing but seedy art instructor, and he provides this production's one illuminating insight.
"We've got to hit them hard in the first 20," is the sort of illuminating insight the viewers, old or young, can work out for themselves.
The former secretary general Kofi Annan's autobiography Interventions: A Life in War and Peace offers an illuminating insight into the high-stakes world of international peacemaking.
There are similarly illuminating insights into the labor pains of "Follies" (1971), "Passion" (1994) and "Road Show" (2009), the musical formerly known as "Bounce" (2003).
Although Miss Didion never discusses such grand narratives as elections for governor and recalls, nor does she mention Hollywood, she offers illuminating insights into California's capacity for delusion and reinvention.
The great outlines of history arise through the vast labors and the illuminating insights of historians and philosophers, but much of history's raw material, the simple facts, emerge subtly and quietly to offer a surprising new twist on a long-familiar story.
As she recounts her own case, and examines in detail the case of a fellow-professor at Northwestern who was obliged to resign after being charged with sexual misconduct, Kipnis adeptly applies the now unfashionable but enduringly illuminating insights of psychoanalysis, with mordantly compelling results, to the actions and motivations of those who have become ensnarled in institutional scrutiny.
This work may be useful for rationally designing photocatalysts and providing illuminating insights into the photocatalytic mechanism.
