light trough造句

During the 1960s, following Birrell's'departure from the Council, alterations were made to the library including the replacement of the light troughs and suspended lighting features.
Neon tubes, hidden within a 300-foot-long light trough that cuts diagonally across the facade, will wash the glass surfaces with a slowly changing palette of soft gold, red, blue and green.
Installed in the ceiling of the library were two concentric light troughs formed with fluorescent tubes between purlins concealed with a translucent acrylic sheeting, operating in much the same way internal lighting operates with most current suspended ceiling systems.
It's difficult to find light trough in a sentence. 用light trough造句挺难的