Invented by Germany-based company LeuchtKraft, the Nachteule light clips with ease to any pair of glasses to produce a powerful light shining in the direction you want at 45° radiation. It’s prefect for use to read book in bed or on the plane, and any activities that need powerful yet healthy light. Highlights: Latest LED Technology, Bright & White LED, and Lithium-Ion battery with up to 40 hours of reading.