I would call them and tell them you wanted the 2x 40w bulbs and see what their customer service will do for you. If that is what you ordered, that is what you should have gotten. Can't hurt to give it a whirl.
Thanks everyone!
I think what's bothering me is that they said (2) 40 watt bulbs were included, which is clearly not the case
If it was me I would keep the T-8's more efficient more useable light and much easier to change out because of smaller diameter but you could always call them and tell them that they said it comes with 2 40 watters but came with 2 32 watters. Did you get to pick the bulbs that came with it??? if so it might come with 40's but you picked out bulbs that only come in 32 watts
I would call and thank them personally. T8s, despite being only 32watt, put out more light than a 40watt T12.