Well this is a nifty little project!  How to DIY concrete and rebar outdoor solar lights!  They're really quite easy too!
I'm always on a quest to light up the outdoors with subtle decorative low-light solar lighting as I've pointed out, lighting is like room jewelry.  Not only for an indoor space, such as lamps, hanging fixtures, and such but also for an outdoor space.
Multiple sources of light and multiple types of light, as in varying bulb wattages, plus the ability to adjust said light with dimmers create visual warmth, cozy ambiance, and all-around comfort.  Rockin' good things in my book.
Your home is yours, it should be a place of solace, joy, and where you can live out loud your best design, decor, and lit life. Of course indoors, and out, sometimes just some bright ol' task light is required but in general, I strongly encourage skipping harsh overhead or singular light sources and instead use varying light sources and light types in your daily life.  
Trust me!  Give it a whirl!
Lighting doesn't have to be expensive either.  I mean, obviously it can be, but thrift stores or buying secondhand can result in some amazing gems.
Or, get handy and DIY it.**  Even turn a recessed can into a pendant.  I mean, c'mon!
Indeed, I was on a concrete kick for a bit there.  Mostly because I'm a big fan of the material, its ease of use with spiffy results, and too, I kept ending up with full bags lying around, wanted to u...