+1 on that. I was a armed security guard too. In a few BIG warehouses, low light, that I had to check out every few hours...you can't see crap in there. I always had a Mag Light with me. I mean, holding the mag light in my left hand and the gun in my right hand.I will tell you this I worked nights as an armed security guard. I found that for night shooting standard sights work better.
IF you intend to use it as a defence weapon I urge you keep the standard sights on it, in a low light environment you will NOT be able to hit the target