When the power goes out in my apartment bldg, (other than a flashlight

Look to camping lighting. A Coleman propane is really bright and lights up a large area.

Not going to happen. Unless you purchase a generator and even then, that is a stretch. I use candles in the sinks and invest in battery powered camping lanterns. Even solar lights will work, just have a ton of them outside your unit in the sun!

LED lanterns, run on batteries. Check Amazon!

Battery operated led lights..

Nothing lights up the whole unit. I had one of those large florescent lights that I would put in hall cause it was so black in the hall you couldn't find your door, LOL. I keep several oil lamps and those glass prayer candles in the glass from the Dollar Tree, and keep a book of matches on top for when the lights go out in each room including bathroom. Helps to have one of those long handled lighters too. Otherwise you would have to have a gas generator for your deck, you can't run it inside, fumes would kill you. I also had a large battery power saver for my laptop that I could run for 45 minutes.

Candles in holders that contain the dripping wax. You can find some gorgeous ones and three or four of them should do the trick.