I've got my eye on a 600 watt switchable digital electronic ballast.You have not comprimised any lumen issues as you would by using the conversion bulb.The switchable is not that much more.There are a few on ebay.But,do what cha wallet let's ya do!! Tax time is here!!!! I'm gonna get 1 in about 2 weeks.The vortex fan you mentioned.That will be more than enuff.Still I would put the oscillating fan in there as well.Make sure you have a dampered intake so as to get the most from your fan!! Meaning it will cool the room faster ond get the much needed co2,the natural kind,into the room! Grow on! Good luck with it all.

Ga Grown!