of course an un-defined issue...
Last year when i was appearing in the driving test, my friends told me that some inspectors declare You fail if You put these HW Lights on & some vice versa. Any How Alhamdo Lillah I passed the road & luckily there was no fog on that morning.
To me it should remain off,,,, because it can attract some one to come closer to You & give u a back lash.
JUST USE YOUR DIM BEAM...