for most of the time headlights/tail lights use convetional bulbs

now you can choose from HID, Xenon, LED etc.

question is - will this be an option? not a cosmetic one obviously

Sure, you may be adding in a menu, and giving the player some more choice, but do you really need it? Is is valuable enough to warrant UI space, which is already at quite the premium? If you would like, just imagine they are included in higher trim packages.

Or safety levels, or quality sliders, plenty of scope as is to imagine differing light types

true and true again, should be put in a tooltip somewhere :mrgreen: