The Helm of Light is a very powerful magical helm. Wearing it eliminates the need for light sources, as the helm illuminates everything as if it is daylight. It also has the defensive value of a magic helm and keeps the wearer warm like a fur cap. It was thought lost in the War of Imbalance, but the Avatar retrieved it with time travel, bringing it to the present.
Issek originally had the Helm of Light, but he became locked into his own maze and died there. In Ultima VII Part Two, while on the quest of the Silver Seed, the Avatar found Issek's body with the Helm. It was useful, but it is unknown what happened to it when the Avatar left Serpent Isle.