I have some cracks in the glass (plastic?) of the 2012 DB9. Small lines near where the bulb is.
Is there a way to fix this? or is it needed to change the whole front light?

 

 

Looks like stress cracks from an impact or pressure as mentioned. It's not on the surface it's in the material. I would say new lamp to repair correctly. $$ you could try hair dryer or heat gun an see if it changes appearance of the cracks?

 

Looks like what we call crazing in the aeronautical community. I see it all the time on canopies. Nothing you can do about it, just replace it.