I've been brewing from kits for a while now, but I've decided to try an extract recipe I found on this forum. I live in a rural area with no LHBS, so I order most ingredients online. The hops' alpha acid percentages on the recipe are higher than I can find available online. So, noob question: is it okay to use a lower percentage of the same type of hops? or is it better to use a different type of hops with the same percentage as the recipe calls for?