Autoflower Journal - 2 Nirvana Short Riders, 1 Bubblelicious 250 watt HPS

This is my 1ST autoflower grow, so any tips from people WITH experience will be greatly appreciated.

I am growing 2 Nirvana Short Riders, and 1 Nirvana Bubblelicious for this trial run. Here if a run-down of my setup: using small closet 2'x4'. I leave the doors open to help control heat and humidity. So far temps have stayed between 73-79°, humidity is between 60-68%. I'm using a 250 watt HPS bulb in an air cooled hood fixture.

Using Fox Farm "Happy Frog" soil in 3 gallon pots. I used about 2.5 gal water while mixing up my soil. The water was distilled, and to each gallon I mixed 2 ml Humboldt Roots, and 1/2 tsp of Humboldt Nutrients "Myco Madness", then Ph'd it to 6.4. I also added a 1lb bag of Perlite to a 2 cubic ft bag of the soil.

My grow is primarily for personal smoke, and to kill my curiosity about this autoflower hype that seems to be going around. Nirvana claims the Short Riders only take 60 days from seed to harvest, while I'm a bit skeptical, I am also hoping they're right. I know I'm going to get eaten alive for admitting this, but I don't do anything special when it comes to germination... I simply make a small hole in the soil, insert seed, cover with just a tiny bit of soil, then mist the area with Ph'd water to ensure it's plenty damp. The first Short Rider came up in 3 days, the second Short Rider broke soil in 5 days, and the Bubblelicious came out after 3 days, but it was started about a week later. I know I could have speed things up by using the most paper towel trick, but I wasn't in a hurry and didn't care if they took 2 Weeks to show their pretty faces. Plus, I've NEVER done them any other way, and have always stuck to the "Grow With What You Know" philosophy.