Flashlight Drain and recharge.
time for it to drain when on: 15 seconds
time for it to recharge to full power: 5 seconds
This would be stupid, IMO. It wouldn't stop wraith killing that much either. ZS would turn into Alan Wake, lol. You seek for light.
It gets pretty annoying to recharge your flashlight every 20 seconds, especially on dark maps. It would also make ZS a lot more harder for survivors. E.g, Couple survivors are defending the same spot with flashlights on. The flashlights drain and nobody can see.
I do agree that there should be some kind of drain. But it could be one to two minutes with 10 second recharge.
Only way to make it fair is to remove the shadows.