Solar panel on roof:
"nightlight" solar panel above one window:
Nightlight: I turn this on when I do night check so I don't have to go full blazes with the lights to top off water and drop more hay, Java needs her beauty sleep. And, just in case something happens with the system, I still have a light.
Example of a light in the barn with reflector to make the light go where we want it, and tubes to go around the tubes so I don't break a bulb while trying to do something, or in case Java raises her head that high. We have two lights in the loft, one in the tack area, one in the overhang, and two in the aisle for grooming. Plenty, and there are three switch options, tack & aisle, loft, overhang. All at the same time too, of course, but I don't push my luck and run them all at once frequently.