A pair of klieg lights.
klieg light definition by Webster's New World
Origin: after its inventors, Anton Kliegl (1872-1927) and his brother John (1869-1959), United States lighting engineers
klieg light definition by American Heritage Dictionary
Origin: After John H. Kliegl (1869-1959) and his brother Anton Tiberius Kliegl (1872-1927), German-born American lighting experts.