ya just keep your plants close but not too close to the light. Place your hand at the top of the plant and if your hand is uncomfortable after a minute of leaving it there than your light is too hot.
In veg, the more light the better! Sometimes i will place my plants in the sun for an hour or so and this really boosts their growth and health.
Good luck!
I mean it won't harm your plant, but it's generally better to use a 6400k for vegging. If you already have it, use it, but otherwise I would get another 6400k for vegging.