Lol,3 reasons really although I do have a thing for trees.
1) They should have been done ages ago but due to security reasons I've had to move the grow 4 times in as many months so I've had no solid premises in which to finish them off,in the meantime they're just getting bigger.
2) I have to split the crop with the lad whose house it's at and I'm not in the habit of sharing chump change,bigger plants = bigger pay!
3) I was sifting through a few threads catching up on stuff missed and somebody (possibly DST) mentioned sarcastically that Mr West says that the Cheese should be vegged to the size of a washing machine,seeing how damn viney it is it made perfect sense!
I have a 400w and a 600w,standard euro on the 400w and a cheap cooltube for the 600w. Given the size of them now though I'm considering just hanging the bulbs bare vertical.