White Balance -- To determine what is "white," the electronics in your camera must be shown a white object under the light that you will be video taping in. This is called "white balancing" your camera. If you do this manually, you must do a white balance every single time your change from one light source to another. Otherwise, your camera thinks white is what it saw under florescent lights when you are shooting in warm sunny summer sunlight. By adjusting the white balance on your camera you ensure that colors are reproduced accurately.
Some cameras have settings for indoors or incandescent and outdoors or daylight -- a kind of pseudo white balancing. Many newer video cameras have an automatic white balance setting. For continuous shooting in changing lighting conditions simply set your camera's switch to "automatic." For the best possible color fidelity, check your owner's manual for instructions on how to set the white balance adjustment.