Thanks for the link, Irish.
So, this one will indeed "tame" the lights, yet the only sure way to shut the lights off on all these crazy merchants is to go ahead and shoot 'em out?!?
I just feel that this, "lets have everyone lighting up" on a contact thing is just so not quite historically correct anymore. Merchants ordered to black-out in transit, should remain at black-out. A dim blue & shielded stern light perhaps may be shown, or the flames of my destruction, yes.
1 or 2 blazing lights pointing from bow to stern of each freighter, tanker, etc.?