Hey bro, thanks for the messages. Right first off, there was one thing i forgot to tell you it completely flew over my head... Your Lights!!!! 90watt lights are wayyyyyyyy too low man, You are lucky to get any bud on your plants this time round!!
You need atleast 150watt minimum for each of your plants to get a nice amount of bud!! I use 400watt for each of mine which is a bit crazy but totally worth it, And finally the tin foil can produce heat spots in your grow room, you should be fine though because i don't think your lights give off too much heat!! tin foil is better than nothing i guess!!! Buy more lights for your next grow man
thats the most important factor, and if you have any spare dollar get yourself some tiger bloom or advanced nutrients, to help the bigs grow bigger and fatter
peace