You've seen each lamp by itself. Now, use color to see how they work together. The color will help you see how the lights work together. The following steps will guide you to use color to separate what you see:
Select Layer 1, and then press the Shift key while selecting Layers 2, 3, and 4.
Select the Spot_Key lamp, which is to the left of the camera in the Top view, with the RMB. In the Properties window header, select the Object Data button. It's the button with a drafting lamp on it.
In the Lamp subpanel, select the white Light Color button below the row of buttons that define the kind of lamp you are using. In the pop-up color wheel, set G to
0.000and B to0.000so that the lamp is red.Select the Spot_Fill lamp, which is to the right of the camera in the Top view, with the RMB, or select it from the Outliner window in the upper-right corner.
In the Lamp subpanel, select the white Light Color button. In the pop-up color wheel, set R...