I do a lot of writing late at night, and I don't want to have the regular lights on.  I had a little clip-on light on my laptop computer screen that I had purchased at the local grocery store stationery section. It was better than nothing, but the light was very low, and the light did not extend across my keyboard leaving me to squint and guess when looking for keys on the sides.  The Mighty Bright arrived today, and I was excited to try it.  Wow!  My keyboard now has good light all across it, and the light even extends down over my touch pad.  I like the fact that it uses AAA batteries, as they are easy to find practically anywhere, unlike the little round batteries.  I will be looking to see how long the light will work.  The push button on/off switch allows you to use either one or both of the lights.  I'm happy to find that even with only one light on, I can still see the whole keyboard very clearly, and gives more than sufficient light which should extend the battery life.  The goose-neck is longer than other lights, and flexes into any position one could want.  I love this light!