Questions or comments? The Light Ring fits most standard manhole sizes. Powered with LED Lights. The Light Ring was designed in the field by the people who work in confined spaces every day. Finding safer ways to work in and around manholes and other confined spaces is our objective. Integration with the latest technology and safety practices, Light Ring Inc. aims to first provide safer space entry, increased efficiency, extend equipment life, decreased accidents and potentially lower your insurace premiums. Light Ring is made in the USA and is a patent pending product. Check out our facebook page for the latest news and product videos.