Large Yielding Strain For Vertical Lighting?

Im looking for a real good yielder.

I want to run 60 day veg with vertical lightning. i would like something that finishes in 8 1/2 weeks and has a good stretch in flower. Something that branches out well and is a sativa/indica

White Russian is a fairly branchy strain that is a good sativa/indica mix,very potent too, and above average yields, and finishes in 8.5 weeks too! NL#5 is a real heavy yielder, branches out like a motherfucker, a sativa/indica mix, yields in 7.5-8.5 weeks, although in my opinion, not as potent as the WR. Both strains have the "stretch" you are looking for. I'd love to recomend more, but these are the only two I have had first hand experience with and have the qualities you are looking for!