Hey mobay, I would not leave a male in the same room as females for more than 48 hours if you have them on 12/12 of 2 days. With in 2-3 weeks time, you will notice insane growth in your girls if your leaving them on 12/12, as they can almost double in size in early stages of flowering.

Trichome, I do believe your right on the plants being sativa dominant, as 90% of seeds that come from or grow in Jamaica are sativa dominant.