I am less sanguine than you about carrying your Glock in that bag without worrying about a ND: too many examples of folks touching one off when grabbing it.

I assume when you refer to a tactical light, you mean a flashlight attached to your pistol. I think such things are clumsy and generally undesirable: mall ninja stuff. If you are referring to a small flashlight operated with your weak hand, properly operating one while shooting requires training and practice under conditions rarely available at most shooting facilities.

I also have a low opinion of 'night sights': I find them distracting and slow. I shoot much better with plain black sights in low light conditions.

So, with your Glock with plain black sights in a belt holster and a small flashlight in your weak side pocket you're all set.

Just my opinion, of course.