It will probably stall development by a couple of days or actually regress it. It depends when it happened. If you’re lucky, it will have no effect.How might it effect a plant that’s two weeks into flower and your light accidentally goes on for 15 minutes? Strains are poison skunk & lsd
Why not tape them up? It takes very little time. Turn all the lights on outside the tent. Sit inside the tent and seal it up. That will show you any light leak. Duck tape as appropriate.