A hyperbola-shaped patch of semi-transparent white light, visible only at night. Gives the effect of lamp light shining on walls, headlights on the ground, etc.
Width x height of the patch are given (in metres) in the title. Can be rolled from vertical to horizontal, even upside down, to match the light source and surface being illuminated.
Uses mesh library asset kuid_68213_21095 (or its later versions).