Answer:
Gaslights allowed directors and producers to use lighting for artistic effect and helped to create the roles of set designers and lighting technicians.
Step-by-step explanation:
Gaslight is a type of lamp in which a jet of burning gas heats an incandescent mantle. The statement reflects the most important impact of gaslights on the theater in 19th century America is stated as follows:
Gaslights allowed directors and producers to use lighting for artistic effect and helped to create the roles of set designers and lighting technicians.