I bought this light after reading the reviews on it and thought it would be perfect for reading in bed and not disturbing my husband. It seemed just the job, looked good, was lightweight and fitted well on my kindle cover. One of the reviews said the batteries lasted for ages, and this is where I feel let down. I have used the light with the included batteries for three nights (approx. 20 - 30 minutes per night) and after the first two nights, the light very quickly dimmed so that it became very difficult to see. On the third night I had to unclip the light from the kindle cover and actually hold it close to the screen to read, and even that was a struggle. If I need to replace the batteries every third night, it is going to work out quite expensive even at £2 for ten. I love the look of the light, but the performamce is definitely disappointing. It would have been a great help if the product information said how many hours I could expect to get from each set of batteries.