You will get told this by other people but I will let u know since no one has replied..

aluminum foil doesn't do a whole lot as far as reflecting light, it helps but plain off white paint reflects like 80% light or something like that so if your walls are white or can get them white it helps alot

and you decide when it goes into flowering by switching it to 12 hours light on and 12 hours light off make sure no light is coming in whatsoever from the outside when it's on 12/12

also i'd probably put them on 12/12 soon because I hear floros don't do that good for flowering cause it cant penetrate very deep down

keep in mind I'm also using floros and I took all this advice and it helped me alot, also probably dont use the nutes anymore once they're in flowering cuz it's more nitrogen than anything and that slows them down in flowering. My floros are 4 foot bulbs but I just took everyones advice on here and it helped me alot