Angelmom, I know you know this....I have no idea how I've forgotten it.....what K rating should the lights be for fresh plants?

yikes HOW DID I FORGET THIS??
I finally ditched the CF light and I went with a triple bulb strip light on my 55. If I get 40 watt bulbs I'll be right at 2 wpg....which is decent considering I'm not trying to grow glosso or setting up CO2, but what K rating do I need for best plant growth/
My choices are a tad limited by the bulb size (T8) but my options are these:
1. Sun-Glo 4200 K 40 W per bulb
2. Aqua-Glo 18000 K 40 W per bulb
3. Ocean Sun 1000 K 32 W per bulb
4. Tropic Sun 5500 K 32 W per bulb
5. Flora Sun (no K rating) 32 W per bulb
6. Ultra Sun 6500 K 32 W per bulb
If you were me...what would you get? I don't think the ones that came with it are going to help plants grow all that much. Advice?