When my insomniac husband asked for a light-up pen for nocturnal list-making I thought he was fantasising so was delighted to find this perfect stocking-filler that does exactly what he wants; shines a light on his list whilst not disturbing me at 2am. Sadly it has lasted such a short time before running out of ink and I cannot see how or if it can be re-filled. A potential five star review dropped to only one!