My Liberty safe came from Scheels. It's a 42 gun that houses a dozen guns and part of my coin collection.
I wanted it lit up so I ordered the light kit from Liberty's web site. I had it in just a few days. It was pretty easy to install. As the directions cautioned, rifle butts can get in the way of the motion sensor so don't be too poor to pay attention. Anyway..... after the lights were installed I asked my wife to help me put things in it as she's a better organized than I am. When she opened the door she was pleasantly surprised. "Wow, did it come like that?"
"No ma'am. That's all Mr. DIY."
If you have an outlet in your safe add the lights. If you don't you should add an outlet and add the lights. It most certainly adds to both the safe's appearance and utility.