I run a 12 lamp Quantum Badboy t5 fixture.
10 lamps I run @ 6400k and 2 lamps @ 10,000k+uvA.
I run them the entire life of the plants.
You can see the specs
HERE.
I use them as I try to replicate the natural environment I live in here in Colorado.
I can move my plants(canna and veggies) outdoors into direct sunlight with no ill effect.
No hardening off required.
May not work for everyone but my result have been pretty good.