Which 600 Watt MH Bulb?

For my very first grow of any kind, I plan to use a Hortilux 400 watt MH bulb during the vegitation phase. The only question is, which one of the following should I use? (note that my flowering light will be a 600 watt HPS):

Hortilux (Hor.) 400w Metal Halide Bulb - $68
Hortilux Blue (Hor.) 400w Super Metal Halide Bulb - $115

Any link to the site any more info kelvins, lumens? But plants in the veg state like the blue spectrum.

depends but here is a little piece of info just got off the phone with a guy at htg supplies i was going to order a hortilux bulb and he asked me if i had a digital ballast and i told him yes i just ordered one and he said dont get a hortilux bulb because they just put out a artical stateing that their hortilux bulbs blow after 4 days of running on a digital ballast and he told me to chose anyother bulbs besides hortilux like sunmasters they have great bulbs mh and hps hope this helps

I also have read a lot about the hotl bulbs blowing on digital ballast. Google it. You will see so much.