Our Costco had these little lamps last year for under $10 Cdn. There were 2 in a pack. I have used it a lot and it is now dimming so will need new batteries to get it brighter. We use them to play cards when camping and also I take to my quilt days as some people don't have as much light in their house as I need. Just read the review and forgot they came with a cable... I should dig it out and see if it makes them brighter again :-)
http://products.ottlite.com/p-429-led-book-light.aspx