The listing, Toilet Nite-lite has ended.
The handy "Flush Light" should be standard equipment on any modern commode.
There is a built-in red "night light", which brightens just enough so you can "see to pee" when you touch the handle. It dims again later, automatically. A quick hand wash in the semi-darkness and you are back to bed, and more importantly, back to sleep, because you didn't have to turn on the bathroom light.
The Flush Light runs on one 9V battery, which is included. The unit easily replaces your old handle, or your money back. I timed it, installed mine in less than 10 minutes, including hunting down an adjustable wrench, fussing around with the nut until I read the instructions (Toilet flush handles always have left-handed threads! Who knew?) - And then my old chain had broken years ago, and was tied on with a twist tie from a bread sack, which I just untied and then tied to the new handle. Perfect! And I am no handyman! You can ask my wife. Because I accomplished this I will strut around like I'm Tim the Toolman for several days.
The toilet seat in the picture is mine, my camera doesn't do low light very well, the light provides plenty of bowl illumination. Now if your spouse has installed one of those furry things on the lid, the seat might block a little, even then you should be, uh, good to go.
NEW IN UNOPENED PACKAGE AS SHOWN
PLEASE NOTE: If your flush handle is mounted on the SIDE of the tank, you have a WEIRD toilet and this won't work for you as designed.