Your Opinion on Bulbs

[Centerforce]

Please give me your opinion on the following two Metal Halide Bulbs
XM 400w 10k and Coralvue 400w 10k
Going to buy new bulbs to start up my reef and looking for the best out of the two

TIA

[Geoff]

the XM 10K has a much higher PAR rating than the Coralvue 10K. i have tried the Coralvues a couple of years ago, and had horrible luck with keeping them firing for more than a couple of months. i finally gave up and went with XM's. that was 2 years ago, so maybe things have changed.

G~