Osram Lighting What HID Brandand Kelvin Capacity Is Better?

What HID Brandand kelvin capacity is better? - osram lighting

a) I make many trips trrips and off road, using the brightness is secure HID: 4300K, 6000K or 8000K?

b) that the brand is best? Bosch, Osram, Philips, eagle eye, never to burn, etc.?

Is there anything better for this type of HID?

c) the color of light, which is preferred and inytensity for fog, low beam and high beam?