I'm in the minority here but I have had completely light sealed rooms and rooms that were riddled with light leaks. Herms have always been a bigger problem in the better sealed rooms. It seems like every little bit of light always upset the plants in rooms that were better sealed. The room I'm in now has uncovered led's and leaks all over the place. I've had one herm in 5 years. More sealed rooms that had a door opened At the wrong time or similar problem would throw hella nuts. But to your case in particular, if they don't have any leaks now hitting them with a weekend of leaks might throw them over the edge. Just my two pennies on light leaks.