And now a little info on Lowryders

Lowryders start to flower after about 10 days of veg... You will not need to buy a blue spectrum bulb for 10 days of veg, why not just get 2 reds, unless you are planning long term. As for Lowryders, you can use a HPS or warm CFLs for the whole grow (I stuck 2 23w cool CFL along with my 6 warm 42w CFLs to get em off to a good start). If you have some cool CFLs, use em, if not, not a big deal for Lowryders.

Long Term
1 Red, 1 Blue

1 Blue for veg
1 Red for flower

Use both all the time.

[edit] I like to stick my plants outside on sunny days so they can get a nice full spectrum of light when possible.