The VW factory original fit LED Lamps are quite good. I have no idea what comparative £price the might be. However Mrs has a Yeti Motion Elegance with HID bendy lights which are really excellent and shows up the Caravelle lights by a long way having far greater intensity, spread, depth and range and can turn with the steering, spoilt.
Colour temperature, it is better for seeing where we go if bulbs lamps and so, are in a temperature range that is not too extreme because the human eye is not linier in its efficiency. I believe this might become be more of a case as we age.