Checking Sanjays Lighting site
, he didn't test Plus 14K bulbs, but did test their 10K. The 10K's test OK. With an M57 ballast, Plus 10K = 53 PPFD compared to an Ushio 10K = 75 PPFD, Hamilton 10K = 71 PPFD or XM 10K = 62 PPFD. Keep in mind, 10K bulbs typically put out more PPFD than 14k or 15k bulbs. The 10k Plus bulbs are very yellowish looking according to their spectral plot.
I don't see any 175w Blueline bulbs tested.
I use 175w Iwasaki 15k bulbs. Using the same M57 ballast, they put out 71 PPFD.
I've found with metal halide bulbs, you get what you pay for.