Supposedly LED lighting has come a long way in the last ten years and is better now, but when I used them, they were horrible in comparison to MH or HPS. Also, they are ridiculously expensive. Your veg looks good, but the flowering doesn't look great. I have to agree I'd shitcan the LED's and pick up an HPS ... A 600 can go a LONG way ... as far as going the cheap and stealthy route, I'd say, yes to the stealthness but it's never good to do things half ass ... that doesn't mean buy a bunch of shit that u don't need but seriously you have so much space and it's not being used effectively ... shut the led's off when you take pictures so we can actually see the flowers ... I'd say you have some good ideas but they need to be fine tuned ... try different things all the time, that is how u learn a lot ... and aluminum foil??? seriously dude??? come on ... get serious here ... don't be using aluminum foil if you don't want to get the term noob thrown at you ... lmfao