Ballast/lighting Question

Hi everybody! I recently purchased a 400W Pulse Start Metal Halide Ballast ANSI M155. I am going to be using it to Veg, I want to purchase the best light possible for this ballast. Which light is better for the job ?

http://www.metalhalideshop.com/index.php/metal-halide-pulse-start-lamps/mogule-base-ex39/400-watt/mp-400w-bu-uvs-ps-em-950-57129-pulse-start-lamp.html
or the
http://www.metalhalideshop.com/index.php/metal-halide-pulse-start-lamps/mogule-base-ex39/400-watt/mp-400w-v-uvs-ps-740-71642-pulse-start-lamp.html

This is my first grow and the plants are currently vegging under 17000 lumens of cfl lighting ranging from 6700k to 5000k..

My intention is to run the MP 400W/BU/UVS/PS/EM/950 Pulse Start Lamp If I can and simultaneously run 2x 40Watt 5000k CFL's, 2x 40Watt 6500K 48" T12's and 2x 26Watt repti-glo 2.0's 6700k. Would this be okay to veg lets say 10-12 plants?

Thanks in advance!

One of them is 4000k and 41000 lumens and the other is 5000k at 30500 lumens. The 1st one gives off more light, but i think 5000k is a better spectrum of light for vegging. I'd probably go for the one at 5000k. You should be able to find MH bulbs which give off the right spectrum and have a higher lumen output. The site you are looking at doesn't specialise in grow lights.

Depending on your grow area you will need a minimum of 3000 lumens per square foot. Aim for 5000 lumens if you can. There's some info on bulbs here.