LightAttenuationLinear Property

Gets or sets the linear light attenuation factor. The intensity of the light source at a given distance 'd' from the light position is Atten = 1 / (att0 + att1 * d + att2 * d*d)

This member corresponds to the att1 variable in the equation and is undefined for directional lights.

public float AttenuationLinear { get; set; }