Yes, you can spray straight water to help with low humidity, and Yes, you should either raise of turn off the HID lights.
Faddenator Reviewed by Faddenator on . Foliar Feed Vs High Humidity Getting signs of low himidity stress in my veg room (16% humidity, lots of air flow out of the room and now getting canoeing leaves)) Will foliar spraying once a day substitute for a higher humidity? Twice a day? Shoud I turn off my MH lights to avoid burning the leaves, leaving room lights on so as not to trigger flowering, and foliar spray (wet) the leaves once a day to add back the moisture lost to evaporation? (ph 6.0 water with no additives?) Should I use an additive in the Rating: 5