My first led light, called "The Arc" was used by my wife it as a piano light. After some time she complained that the cone of light was to shallow to enlighten two pages of music. So I got back to the shop and made another version using leds on a long pcb. To hide the ugly part I milled corresponding holes into pvc hard foam and sandwiched it with a bar of birch plywood. Apart from the head I just had to change the connector to the arm.
My build was done from 6,5 mm birch plywood, 5 mm PVC hard foam and some 4 mm high density fiber using a desktop cnc-machine by Stepcraft. The 'arm' needs to be cut twice from the high density fiber.