Well there's a hundred variables that will influence the growing times of plants. You know way more than any of us about the particulars of your NFT system. If what you've been doing works for you, don't change it just because you're growing a different strain. You know what to look for.

For your light, red only will work but I'd personally get one 6500K or so, just for a bit more veg power. In my opinion it helps a bit during flowering, too.