I tend to try and buy Sylvania in general since they're inexpensive yet they make a decent product. I used to be a GE fan, but I've noticed new GE lamps are crap.
I generally use Sylvania lamps as they do seem to be performing quite well. I have 1 175w MH, 175w MV (clear and coated), MR16 50w, incandescent blacklight 75w. The other generic MV that I got with a yardblaster doesn't start reliably. It has a shortened arc tube, and discovered that many new MV's have this problem.
This is the first off brand I'v used It seems to operate rather well with great color . I normaly use GE, Phillips or Westinghouse. accualy this is the first Arc Master I'v seen.
No idea if they're any good.