The Lightverse is a Universe that is entirely composed of light matter, light, and materials made of light like photonium. Being inside a lightverse can be extremely dangerous due to the large quantities of deadly photons, including X-rays and gamma rays. Very little solid matter exists within these -verses at all; it can be difficult to construct a permanent base or space station inside. This concept was created by AarexWikia04.

Variations of lightverses exist; among them are the light-multiverse, the light-megaverse, the light-metaverse, and the light-archverse. There is no light-omniverse.