Reduce Electric bill

I've been using these lights to save on my electric bill,a little helps,they charge by solar panel,cell phone plug,i can charge my cell phone with this device,it lights up my bedroom,kitchen,bathroom,hallway,shed,i can take it camping.i can take it anywhere,it all so has a spotlight. ... https://www.youtube.com/watch?v=e7Q211Ug7NE