Question about Philips Hue White & Color Ambiance Infuse

Hello Together I would like to buy a lamp for my new room which has a sloping roof on both sides, I am very interested in the Phillips Hue products which can display white but also colours. My first question is do I really need a Hue Bridge just for one lamp? and my second question is will the lamp be bright enough to light my whole room because as I understand it the light shines on the ceiling and reflects back? I would mount the lamp on a wooden beam. Thanks for your help!