I put those led lights in my antique breakfront so my wife can light up her stuff. They are real easy to put on with dbl sided tape, and the base slides off for battery replacement. You can try them from Home Depot, buy one and if you don't like it just return it. You will need at least 4 depending on the safe, they don't give the kind of light that Rembrandts do by any means, but if there were a blackout you could still have light. Even as backup lighting. Power is probablly the first thingto go, and even though most of us have generators, by now, they aren't any good after a week at best. My marine bud just put his 3d one in. He has 3 houses, and they sank a propane tank like the one I had for the pool heater. He can run full on 24/7 for 8 days. But like he says you can make it last a month. I just don't have 15 grand for a propane system. If I did I would rather buy more guns, lol