SpotLight(Vector3, Vector3, Single, Single, Single) Constructor

public SpotLight(
	Vector3 position,
	Vector3 direction,
	float innerConeAngle,
	float outerConeAngle,
	float range = 3,402823E+38f
)

Parameters

position  Vector3

Vector3 that specifies the positions of this light

direction  Vector3

Vector3 that specifies the direction of this light

innerConeAngle  Single

inner cone angle in degrees

outerConeAngle  Single

outer cone angle in degrees

range  Single  (Optional)

range of this point light - range does not affect the light brightness but just disables light calculation for all pixels that are farther away

Reference