If you think that installing too many lights in every corner of your house is simply waste of money and electricity, then you are just on the right track. But, you also want that no corner remains untouched with the illumination, especially the staircases, then here is a DIY idea from Edo. There is a laser beam at the top and bottom of the stairs, and the height of the beams allows it to detect humans and light up LED when it comes dark. There is an LED installed under each stair tread, which softly lights each stair. Thus, the every step you take on a stair, LED keeps the stairwell lighted with each step. Undoubtedly, it is cheaper than installing other foot lights, and also energy and cost-effective. Check the video for a better illustration.