Newish grower

Hey guys, I have been growing under a normal 400w hps but I recently upgraded to a 1000w and didn't have a reflector for it. So, I just let it hang vertically. Then, I saw this area of the forums. I'm just curious, what are the perks of growing vertically? Sorry for the newb question hah

It gives more space and makes the plant into sort of a bush, it's almost like lst.