I have been looking now at some auxiliary lights and I have pretty much decided on the Hella 500s because of their affordable price and quality. I have used the search feature to look for information, and still I cannot decide between the 500 and the 500ff. I know they are very similar, but for the close price, I am willing to put out a couple of extra bucks for a little gain in performance. The question I have is this: which lights put out the brighter, farther reaching light. I am pretty much looking for something to light up the woods, and will reach out farther than my high-beams. If it is any help, I am looking at running 4 of them on a basket type roof rack. So, should I go for the 500s, the 500ffs, or a combination of the two?