I love using my ipad and iphone as source of light. not as the main one but when I need light and there's nothing else at hand, like when you're trying to make your away across your dark room in the middle of the night, it's a great help!
When the power goes out, it is what can illuminate and handy. Since most of us do not carry flashlights around the house all the time, we make do. The whole point is that it is surprising how much illumination an iPad can give in a pinch. Using it to keep from stumbling over the dog hill you get the flashlight is just good sense.
The fireplace APP has been known to 'set the mode' in those hard-up emergency situations.... Isn't it amazing what these iPads can do... . Can you imagine if Steve would give us a camera
Just as the continual saga of Oklahoma weather was on the news again, my power went out. Normally very reliable, it has suffered through the soggy day. So now, I am without lights, TV, AC, and wifi. Luckily for me, I can get to my flashlight with my iPad, listen to music with the iPod function, surf the internet with 3G, or play games, or read a book. This is a good example of a few of the ways the iPad is useful. Now if I had a battery powered CPAP, I could get a good night rest. Especially if my AC had backup.
This makes a good case for having the HyperMac Battery Booster for your iPad which will give you 34 to 99 hours of extended time depending on which model you get.
What if you only had 20% battery life left when the power went out? From what I have read Apple does not recommend leaving the iPad in the charger constantly when no in use.
I had a program on my windows mobile phone called torchlight that allowed you to turn on the flash from the camera. It was very bright - I used it quite a bit. The iPad is a bit awkward.