Germanation questions

[Rye]

I have read the page, and decided that a metal halide will be the route I go. Mainly because as I work into this I plan upgrading the method and planting area of what I am doing. So, this first run will be Kale, the next probably spinach or lettuce.
From there I plan on going to an NFT system and growing about a 4x6 area. My T5 light won't be enough for that. So, I've selected this light and remote ballast.
lights" target="_blank">http://www.greenhousemegastore.com/p...st-grow-lights

My thoughts are if/when I move up in production again to a greenhouse, I can move this light over to that. and continue to use it.