I recommend staying away from coco. The issues are neverending. Certain nutes it holds on to, others runoff too quick... As for your light, the Mars Hydro TSW 2000 is a great option. I adore mine.
I'd using a soilless medium, get a silica supplement like Armor Si (always mix in feed VERY well before anything else). I also use hydroguard for root rot prevention and Diamond Nectar to increase uptake of micros. If you end up going with coco, be sure to get nutes specifically for coco. Nutrients for "all mediums" or "coco and hydroponics" are not good enough.