I need to know the following. First, explain to me how the level of humidity effects plant growth. What happens if the humidity is too low, too high, optimal, and in which stages of growth is humidity level most important?

Next, I need to know about light leaking onto the flowering plants. What will happen and how much light will it take to make an effect?

I've read alot of threads on riu so far so I know that there are alot of you guys and gals out there who are full of useful info on these two subjects so dont be shy, I wanna know everything you know.

And just for fun, have any of you ever tried The Third Dimension by TGA? If so how was it? Quality smoke? Worth growing?