quote=klondike_bar

...but is there actually a point where the top of the mainstem will suddenly start growing another couple inches of cola?
Yes, but it's about 3 weeks after you go to flower mode. Then all hell should break loose as they really start stretching and pouring on the buds and nice long colas. That is assuming you have proper light.

stupid agro-lite...i was deciding between it and a 48" grow tube...
I've never had much luck with the grow tube fluoros. I would stick with CFL, I've had much better luck with those. Even though they are more expensive, you should get vegging bulbs for veg (5000-6000K), and the cheaper budding bulbs for budding (2700K). And reflectors, homemade or otherwise. I understand the newer and smaller G-5 tubes are really good, but I'm leaving those out due to your budget.