There are a few ways to do this.

1. You can parent two spotlights to the car, in the headlight recesses. You can then use the atmosphere settings in Poser. This will cause the lights to show beams. This method is good, but for an animation it will take a long time to render.

2. A shortcut is to parent to cone primitives to the car, and apply some sort of cloudy procedural texture to them, and give it a small amount of ambient light. (The cones must be basically invisible with a small glow to them). This will render a lot faster.

There are a few other ways as well, but these two are the easiest.

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