First grow! BSF - Green Tiger

GUYS, I THOUGHT THAT FAST FLOWERING WAS JUST LIKE THE AUTOS!! I didnt expect to they grow up like that so I'm kinda lucky by having space. Before I put them into flowering I was thinking that they would just go to flower by themselves, so I read again and that's it! The only problem is that i think the light it's not strong enough to the 4, but there's nothing else I can do now, only buy another lamp... I honestly would like the auto because by now I would be harvesting them, but no problem, it's better for learning anyway. My biggest fear by now It's mold, the humidity here are like 85%, i let the vent on all day but don't know if it's enough, the cold seasons are ahead, wish me luck! G