animID=ThingLightAnim(thing, min_light, max_light, fade_time);
min_light: This is the minimum light that the thing will have during the animation.
max_light: This is the maximum light that the thing will have.
fade_time: This is the time in seconds that it takes for the light to fade from one light value to the other.
This verb is similar to SurfaceLightAnim(), but note that ThingLightAnim() does repeat while SurfaceLightAnim() does not.