Yeah man, it's just something I have picked up .. here is th eonly examples I have got pics of, but the bushy one is c99 and it flowered at 10 inches and ended up at 40. 4 x stretch, and if you look in the mirror in the shot you get an idea ,there is like 1 - 2 feet of useless height on her ,just stem with no bud on it. Again the second pic is lemon skunk, flowered at 8 inches end up at 46, nearly 6 x stretch, and once more just look, a foot or 2 of unproductive stem/ height around the base. I have noticed with a 250 , its always the top 2 feet of plant that produce well. and anything below is a waste of time/electric/feed.
Can I ask why are you going with autos next? The only advantage I can see with them is you can grow them outdoors and have them finished way earlier than October. Indoor your trading potency for the absolutely negligible benefit of not having to set a timer. Though if I ever did wan to experiment ,dna genetics 60 day lemon skunk might be decent.