Enough lighting?

2 xs2000 would work a lot better

That light is designed for a 3'x3' with 150w of power and about 1000-1100 ppfd in a 2sqf area (more than halved ppfd and light exposure in a 4sqf area), while it may be enough for vegetative stage in flowering it'll cause your buds to be loose, develop slowly, and with less potency! Use your old lights as well during flowering (what light setup btw?) to boost up your light exposure and increase yield or just add another of the same light to increase it. Hope this helps! Good luck and happy growing :)