No it won't. As a matter of fact that's a great combination you got there. Veg with CFL's making sure the lights are as close as possible to the plants (1-3'') without causing heat stress. Later when you are about to switch to flowering (12/12) just turn on your HPS. As a matter of fact you can combine your 6.5K CFLs that you used for veging with your HPS at flowering.
That's wot I thought , my buds on this grow are really leafy n nt very dence , don't no why this as happend I'm at wk 6 and my pal sed they look like wk 3 don't fink it's the strain as he gave me the cutting and us were dence nugs any ideas guys