First time Grow - Drip Hydroponics

Comments welcome and encouraged.

This is my first grow ever. I've converted a closet for the grow.

Mylar on the walls. (Changing to paint for next grow)
600w MH for Veg
600w HPS for flowering
Active Exhaust
Passive Intake
Hydroponic drip system

I started from seeds some Skunk #1 from Gypsy Nirvana, some bag seed and a few freebie seeds. I was able to get about 12 seeds to pop and put them to rockwool cubes.

I placed the cubes into a humidity tent. Only 5 seeds sprouted. I then put them onto my drip system in Expanded Clay. I had a few problems when I did this by giving them too much nutes too soon. But after researching and fixing the problems they look good. I also rearranged the plants. I am thinking about inducing flowering in about a week.

Any comments or tips.

I have two drippers going to each plant and have it on a schedule of 30 minutes on/30 minutes off. I have had a problem keeping any humidity in. But the temp stays around 85 degrees Fahrenheit.

Does anybody have an opinion on whether or not I should wait longer than a week before going to the HPS for 12/12?

This from today.

I put them into 12/12 and had two males that I got rid of two definite females and one still waiting to show sex.