Note that some of these articles are solely about the Irish Lugh Lamfada, others also compare him to the Welsh Lleu and Gaulish Lugus. I’ll leave it up to the reader to determine whether the three are ultimately the same or not- it’s probably beyond our knowing, as mortals.
The Nature & Character of Lugh by Tressa Disney (Ozark Pagan Mamma)
Lugus: The Many-Gifted Lord by Alexei Kondratiev
Lugus by Segomaros Widugeni
Comparison to non-Celtic cultures
The Birth of Lugh– Odin & Loki Among the Celts by Thor Ewing
Places/Groups Devoted to Lugh
Shrine of Lugh– Great collection of literature, essays, prayers about Lugh