Watering questions

So i have some questions about watering plants.
Right now im in the veg stage, my plants are about 5-7 inches tall, strain is northern lights, im using a 400W MH light and grow space is basically unlimited except my height is limited to 4 1/2ft, i have good ventilation as well.
I water the plants everytime the soil is dry on top, which is almost every day, is this too much?
Also i spray the plants with mist all the time, like 4-5 times a day, agin not sure if this is going to help or hinder the situation.
Anyone with knowlegde in this are could help!
Thanks Guys!

Stop the misting....the risk of mold and burnt leaves outweighs any rewards. Watering everyday is not good either. You need to let them use up the resources and stretch out and seek more. Your plants will start to wilt and thats the sign you need to look for. Record the number of days between watering and wilting and you will know roundabouts when to water. Also feel the weight of the pot when its dry as another method to judge the moisture content. All that water you are giving them will increase the chance of mold also.