6pk Solar Step Lights $25

This 6-Pack Triangle Solar Step Lights from Infinite Basics drops from $49.99 to $25 when you enter the code BLAST50 at checkout. Shipping is free. They're fully waterproof and work without any kind of external wiring. They're available in warm and cool options.

I got to try these lights out. I put them on a back stairwell that got limited natural light and after a few days there, they continued to collect enough power to run through the night. It is worth noting that you really want at least one light per stair, since the lights shine across the stairs as opposed to down on them from above, any stair without its own light gets almost no illuminationfrom the lights above or below it.