public void SetLightSource(
	int index,
	Vector2 windowCoordinate,
	Vector3 falloff,
	Color color,
	float aimX,
	float aimY,
	float aimZ,
	float lightZ,
	float apertureFocus,
	float apertureSoftness,
	Vector3[] walls,
	int wallCoordCount
)

Parameters

index

Type: SystemInt32
Indicates which light source to set. Must be between 0 and MAX_LIGHTS - 1, inclusive

windowCoordinate

Type: Vector2
Coordinate within the display at which the light should be positioned with the origin at the top left corner

falloff

Type: Vector3
Constant, linear and quadratic falloff of the light intensity. Google linear light falloff for details.

color

Type: System.DrawingColor
Color and intensity of the light source. Alpha channel indicates intensity.

aimX

Type: SystemSingle
Relative horizontal offset of direction in which the light points.

aimY

Type: SystemSingle
Relative vertical offset of direction in which the light points.

aimZ

Type: SystemSingle
Relative depth offset of direction in which the light points.

lightZ

Type: SystemSingle
Z position of light source relative to map layer. Positive moves from layer toward viewer.

apertureFocus

Type: SystemSingle
Determines how focused the light source is. 1 is an invisibly narrow beam and 0 covers a 180-degree arc.

apertureSoftness

Type: SystemSingle
Determines how soft the edges of the light beam are.

walls

Type: Vector3
Array of Vector3 structures specifying the endpoints of walls (in pairs)

wallCoordCount

Type: SystemInt32
Number of applicable (non-zero) elements in walls. This should be a multiple of 2.

Reference