You're exactly right. These same principals apply to every day life as well. The point I am expressing is that it isn't always necessary to have the most expensive light fixture to have success keeping a reef and you hit it right on the when you verified shopping around for good used items. The way I look at this hobby is that it took me 8 months to get to where my tank is today, what's a few more days or weeks. Shop for that bargain, don't buy the first item you come across. When you rush here you most likely crash and crash broke.