C'mon now. Color-balancing should be the first thing you do when you whip out the camera. It should take you under 30 seconds. And you should be color-balancing your productions the minute you're done with the edit. You know better to assume that you're going to get consistent lighting out of anything but an isolated studio environment.
I work on a soundstage where the lights have literally been hung for eleven years. We still calibrate everything every month and color-balance the cameras every time we turn them on. Don't be lazy.