How hot it get there? Its been 100 plus here with very high humidity. They can take some heat.
You should shoot for at least 100 actual watts for the first plant and 50 for each one after. That is at a minimum. So aim for 4-6 bulbs for the first and 2-4 for each plant after. If you can try for at least four bulbs a plant.
Everyone bashes miracle grow. I don't use it because I'm organic. Other than that, mj will grow just fine in it. Most have problems with it because it contains time release ferts and can burn seedlings easy. Moisture control is one of their better products and is easier to use, even with nute sensitive auto flowers. The key to miracle grow is to keep it on the dry side as not to release to much fertilizer at one time.