This is another one of those items I'll never be without. Weighing in at under 3oz, you won't even feel it. You'll definitely notice it once you blow it up and turn it on though. The solar panel fully charges in 7 hours and will power the LED for up to 6 hours on the hight setting and 30 hours on low. There's also a flashing emergency setting, it's waterproof and floats!. I hang the unit at the top of my tent and it completely illuminates the interior. At home, I fold it up and prop it in the window so it will be ready to go on my next trip. This is a no-brainer. Buy it.