Very nice. You've shown that with some seeds, pots, soil, pH kit, filter/fan/ducting, an LED light, light timer, $15 electricity (total light use for entire 2.5 months), and some good ol' tap water, anyone can grow some fairly decent weed in 2.5 months with minimal effort. No nutrients even! Well done. +rep
You probably would have yielded even more if you had gone with one specific strain... even plant height means you can keep the light closer to the plants, and we all know: Closer = Stronger.
I've been working on an LED project of my own, and I hope to be growing soon.
My Lighting Project - Will a Custom LED Panel Work?