Yes blue is good for veg and red for flowering.But i always have to be different. I start plants with blue dominant light. example 400watt mh- 150 watt hps.Then when it is time for flowering my 400 watt hps and 400 watt mh.I tried this years ago and it just seems to produce larger buds. then again it just might be all in my head.Just figured that the sun is of several spectrums and plants love the sun so why not try to give them as much as i can to help them grow.Or somthing like that.You can scale that down to fit a smaller grow. also i do this with mostly autoflowers. Although i am trying it on some photoperiod plants . so we shall see.