The important question is what size space are you trying to grow in? What's important when choosing a light is the canopy area and not the number of plants. The Mars Hydro definitely has the best rep of any of the lights your looking at, but I've never personally used it and some people have had issues with them. It's also only really 100w so it could only flower a 45cm x 45cm space at best. Probably best for one plant when your starting out.
Those real cheap brand-less Chinese lights can definitely grow weed but they don't do a great job. The bud tends to be airy and the yield isn't very good.
Also, while this Chussu fellow says he's done well with cheap soil from Wal Mart, crappy lights and no nutrients, most people would struggle with that combination. That's not to say growing weed needs to be complicated or expensive, it's just that it's worth putting some thought into the most important parts of your grow.
That feeding schedule from Growweedeasy definitely works fine for coco coir grows. I kind of recommend starting in soil but Coco is pretty easy as well as long as you monitor your pH and nute mixes pretty well. I preferred the Lucas Formula in coco with Fox Farms, but I preferred something like MegaCrop even more because it's so simple.