Hello, I'm using a double T8 fixture for my plants. As of now, they're 1 1/2 week seedlings. I can't seem to find any information as to how to do this and I'm really unsure and don't want to do anything incorrectly. So, you're not supposed to have the light far away at all, because it will stretch the plant, correct? (My seedlings currently have their two cotyledons and 3 days ago got their first two "true leaf" growing. They look very healthy, hair folicle growth is prevalent.) So what I'm wondering, is as they approach the light, with it placed at a closest distance, you obviously need to move it up, but is there a certain way to do this correctly, so they do not "stretch", yet still grow lusciously and tall? (I'm going for a tree tier, classic sativa height here) Any help is appreciated, and apologies if this is an absolutely idiotic question, thanks so much! Also, just as a little side question here, how long would be too long when waiting to flower?