A:Answer Hi Meka,
The Hero 5 does have a low light setting if that helps, I haven't use it yet. but I have use my new Go-Pro Hero 5 for scuba-diving.
The package said it's water prove up to about 30 ft (without the case), Well, I kind of miss that part. I went scuba-dive more than 50 ft. It was a cloudy day, so at 45-50ft. it was not dark, but "low ligh". the footage came out very good.