I would use both lights for veg, but only bloom lights for bloom.

Actually, the ideal situation since you have both lights, is to do sea of green (SOG). Both lights will be on all the time, but not in the same grow area. You could have them in the same grow area, but one or the other must be light-proof due to different schedules. For various reasons I think it is best to light proof the bloom area. This way you harvest twice as often. Much more weed, you know...