set's if the vehicle has lights or not.
not an on off toggle.
p1 = 0 ;vehicle normal lights, off then lowbeams, then highbeams
p1 = 1 ;vehicle doesn't have lights, always off
p1 = 2 ;vehicle has always on lights
p1 = 3 ;or even larger like 4,5,... normal lights like =1
note1: when using =2 on day it's lowbeam,highbeam
but at night it's lowbeam,lowbeam,highbeam
note2: when using =0 it's affected by day or night for highbeams don't exist in daytime.