Led light with the light box baffles are put into three sets wept. Then shine a flashlight through the light barrier. The incident beam to the inside of the metal arches.
Bringing light divider plate 3 compartment light box put into light blocked combinations, and then shining a flashlight through a series of light barrier, beam to fall along the inner curve of the metal.
The plate is a light-box 3 channel light into the light, and then shining a flashlight through the retainer block the light beam, Arch to fall on the inside of metal