ladyslipper, you can get T5 with full spectra.
"Warm light" tubes have approx. 3000K
"Cool light" tubes 4000K
But you can get "day light" tubes with 6500K that in my opinion is even better. They give a very good white light that present the flower colors very well.
I use this myself
OSRAM (edit Osram does not allow me to link to this product, see below)