The purps are all they want. It could be labador and if it's purple it's gone. LOL.

Keep your room about 68 to 70 all the time. Keeps the water just right too. when it gets about 2 weeks from finish choke off the fresh air. We were trying to figure out a bro's grow and why his papaya was turning purp. In the cool air the stems turn purp but when we found the fresh air vent fan had quit on him. He did not know. Next grow all green. Next we cut the fan at 2 weeks til harvest and they loved the purp. Same buzz.

depending on the strain you want to keep them about 2 feet at harvest. 2 feet is about the canopy the light penatrates. We start about 8 inches on sativa and 12 to 16 on indica. systems like the 60 work very well with an autoflower. Many small plants. Yeilds should be 0.5 grams per watt of light. So under a 1000hps you should get 500 grams. This is easier on many small plants than just a few large ones. Anything more than that is super awsomeness.