Which Colour Fog Lamps are Good and Why?

Hi, I own a Scrambler 400X and I want to install fog lamps/auxiliary lamps in it since I feel stock headlamp is insufficient at night rides on highway. I m new to bikes and all (i bought this bike a month ago) so I don't know much about the best brands, lamp wattage and colour temperature. I m confused between 2700K(amber) and 4200K(natural white) fog lamps. Which should I choose? And what brand will be the best? Can someone help me with this?