The 7” Light Dividers by Weems and Plath allows the user to read charts at night without losing night vision at the helm.
The LightDivider also provides the right light for other tasks on board. Built into the legs of the device, the red LED lights are just the right intensity and distance from the chart so that no shadows are created on the chart by hands or other objects when turned on. There is an easy-adjust mechanism that allows quick, precise one-handed operation.
The Light Divider runs on a small watch battery (included) which lasts for approximately 20 hours with continuous use and can be replaced when the light gets dim.
Source: Weems & Plath