Anyone think that this might make for a perfect replacement bulb for the money? Yes you have to use an HPS ballast, but this bulb is dead on in specs. 5200K 90 CRI 33,000 lumens, and 20,000 hour life as seen here ? Now i just need to get me an S51 ballast. Since the bulb is only 40$ and compact and puts out the white light we all like, does anyone want to comment on it?