Light leaking out of tent

Does it matter that the grow light is leaking out of the tent when I open flaps for passive intake? I'm thinking it does bc I wouldnt want to lose any of that precious light going out of the flaps. Any experienced opinions?

No duct sicks to run ducting through?!

You won't want light leaking in when you're in flower.

If your passive intakes are as low as they should be then light getting out isn't a big deal. Light getting in during dark is not going to float though.