How do I get some light in a long dark hallway?

Paint it a light color and add some track lighting down the middle of the ceiling .

Is a skylight a possibility? Or a solar tube. Check out this article https://www.houselogic.com/remodel/painting-lighting/solar-tubes-beat-skylights/

My other tricks for making things feel brighter include large mirrors, very light-colors for walls & ceilings, etc.

There are some cool LED lights you might be able to use and hide. https://www.hometalk.com/diy/decorate/rooms/led-lights-bare-walls-neons-8031891

Led Lights, Bare Walls & Neons

What about some small-diameter rope lighting? It's not expensive, you could run it along the baseboards to light up the walkway. You could purchase some motion-activated battery-operated lighting along the walls at regular intervals. These will do if you want "functional". If you want decorative solutions there are probably some others, but probably more costly.

Put a collection of mirrors on the walls and artwork with glass to reflect light. You could paint the furnace closet doors a very bright semi gloss white to reflect more light.

Thanks everyone for the great suggestions! Am going to explore a couple of the alternatives you suggested. Blessings, SP

Hi,

Add Mirrors and Pictures with glass . You could also add wall lights or ceiling lights or illuminated ceiling or Strings of lights you plug in. Best wishes.