A Spot light is a cone shaped beam generated from the light source location, which is the tip of the cone, in a given direction. Spot Light Scheme. Should clarify this.

• 聚光灯光线是产生于光源的圆锥形光柱,在一个给定的方向上,光源位于圆锥形顶点。聚光灯方案应该明确这一点。