Personally I dont really use any nutes until 2 weeks in, but I'm just playing it safe. A mild nute solution will speed things up if done properly. Assuming those are indeed organic fertilizers, I would fertilize once a week while plants young, then moving towards 2-3 times a week when the plant is mature (aprox 30days). Careful not to overwater right now, the plants are still sensitive. If you dont already have something that test the moisture of the soil I would pick one up, they're super cheap, and super-common @ any garden center. You're temp sounds excellent, I grow around 85-90, which is not ideal, but I haven't had any problems yet. An ideal range would be 80-84 degrees, but a little cooler or warmer is not a huge issue.
I've heard keeping plants fairly close to the bulbs when they are younger helps reduce size, just be really careful when they still vegging. I've had plants seemingly grow inches overnight, and they can obviously be damaged by the bulbs. You can try and anticipate growth spurts, they're usually after watering, or fertilizing. Keeping your plants about 2'' away is probably safe, if you have lower temps you can afford to get plants this close, and closer. can't wait to see how this turns out.
I going to start building my own Stealth cabinet soon. I have my bubbleponics system, and my seeds right now. I'm just getting the seeds started, but I still dont have my box yet, I'm trying to think of what would be best, and what could be weather-proof enough to go out on my sheltered deck.