Dougieferg

Since I'm going to be using hidro for my NL 👏🏻,what's the best feed out there for them or are they pretty much the same,plus I'm reading a lot of use only feeding every other time there needing fed but use just water them with ph's water,is this a good thing for hidro NFL?
any help is much appreciated I'm listening 👂🏻

I'm,thinking about flowering with this double grow light it has 2 240w bulbs in it,will it work or just a waste of time