I dunno if I would trust some regular ol ebay stuff. for the extra 20 bucks, I would get what I have seen works. The oznium stuff works awesome. The ebay link has them for 15 each, oznium is 18 if you buy 3 or more. Plus oznium is 4 bucks for shipping. So for 4 lights it is 16 more, well worth it in my opinion.
From what I have seen, the spotlights are brighter and look the best. The water disperses the light anyway, so a flood light isnt needed.