A light source with LED and optical protrusions is provided. It comprises an optical panel and at least one optical plate. The light source can be used together with a heat sink or an optical element to enhance its performance. The optical panel forms an optical surface having plural optical protrusions...http://www.google.com/patents/US7205719?utm_source=gb-gplus-sharePatent US7205719 - Light source with LED and optical protrusions
