Another light like the one you have would do the trick- and the one you have will be ok for veg, but, here's the deal-
100 watts will grow a plant just fine, but the buds may end up light and airy...but - 200 watts will grow a plant even better, and the buds will be solid and dense.
I've grown under both- and that second 100 watts is definitely a game-changer.
And yeah, a lot of the manufacturers will give overly optimistic specs on their lights- like we're not going to find out that they're lying to us...?