Linear Light

If you could turn a two-point polygon into a light, you'd have something similar to a Linear light. Light is sent out equally in all directions, except at the ends. This type of light is great to use in objects like fluorescent strip lighting.

Ends

The Linear light has an Ends option. This toggle controls the visibility of the end caps. When turned off, the linear light is a hollow tube and emits light from both inner and outer surfaces.

Both lights are 3 m across and 200 mm long and visible to camera. The gold light has no Ends; blue light has Ends checked