Keep it simple. When they're seedlings they need little water, in fact less is better because it will encourage root growth to search out water. The plant will tell you what it needs, don't get scientific bro. Keep an eye on the leaves and the plants overall stature. You'll get better over...
That's what I was going to suggest as well, try MH lights. Even though the amount of light like 18/6 or 16/8 is what will keep your plant in vegetation stage, MH lights provide the same spectrum of light as spring sunlight, closer to the 4500-6500 range. I would notice that my plants would...