"kurt": Are you stating that you are changing the light, as in the fixture? How did you turn it ON/OFF before this change? Are you, did you, install a new (never been there before) wall switch for this light fixture? How was this fixture controlled before? You should be able to control the light fixture with a wall switch using the HOT wire from the ceiling junction box, tied throught the new light switch as the control factor. You should also be using the white "neutral" within the fixture and have a proper ground wire.