if u're getting .5g/watt in 3 mo. vs. 1g/watt w/longer veg time & flower time totaling 6mo., using the same 1kwatts it's the same. u just have to wait longer on u're harvest. since time is money, i think most will agree, the quicker u get meds sold, the quicker u have funds to expand. this is strictly from a business standpoint. of course, steve & several others are experimenting & hard and fast #'s don't always apply, and we're all learning what to expect from led's. i'm doing a seed run w/a ds300 now & even the most stubborn female showed pre-flowers in 16 days from sprouting (12/12) . so far i'm impressed.