I discovered quite by accident that these lights REALLY last. They have 3 AAA battery's.
I accidentally left one of these lights ON the night before last..under a bookcase where I was searching for something. I forgot to remove the light from under the bookcase and turn it OFF. At least 24 hours later i discovered the light STILL under the bookcase..and still ON...AND Still BRIGHT.
http://www.amazon.com/s/?ie=UTF8&key...sl_3ipggv5rd_b
Impressive...

NB
PS: I've turned the light back on and placed it on the coffee table...Let's see how long it takes to run the battery's down. BTW: The battery's are the original battery's......FOUR years old..??