Heyy!! i have a room that the lenght is 15 feet and the width of it is 4 or 5 feet, i have 20 plants and they are about 1 foot long, i know i have to start using some serious lights because right now im using flourcents!. I have 400$ to spend, i wanna get lights that can cover all the plants well but for my price range. Plz give me some advice!!