Since you have stated that this job is essentially temporary until you attempt to work for Homeland Security (holding my tongue on that one) this job is a stepping stone in your life, not your end game. Therefore preserving your job over your life is a non-issue. If you deep conceal then no one will ever know and if you have to use it to defend yourself then you will have been in a situation where you would have most likely been killed anyways giving you the outcome of either being dead or being alive but unemployed. To me there is no decision to make, only a course of action to take and that is to have the ability to defend yourself.
For after the event should one occur:
Document every single incident of your attempt to officially protect yourself through the company and their failure to accommodate, including those lights. Civil court or arbitration could be a very good friend to you if a righteous self defense shooting occurs and you are fired as a result. You prove that corporate had knowledge of your situation and either did nothing or did not take adequate precautions and you could find yourself on the other side of a very nice settlement....assuming you're still alive of course.
Plus, your fiance has the same health benefits right? If termination occurs you may just have to visit the courthouse for a marriage certificate. Benefits restored....or even better check with HR and see if they recognize domestic partners. I receive full benefits from my woman's employer thanks to the gay rights movement and I'm in Georgia of all places. Remember, they can't discriminate based on gender so it works for domestic partners of any pairing. Sometimes the screwed up system works in your favor.
Seriously, check out those benefits. You may have a way out to afford working at a safer job for less money without any reduction in quality of living and not realize it.