public void setLightColor(ColorRGBA lightColor) {
        this.lightColor = lightColor;
        if (material != null) {
            material.setColor("LightColor", lightColor);
        }
    }
Sets the light color to use
default is white

@param lightColor the color to use (alias created, default=(1,1,1,1))
jme3-effects/src/main/java/com/jme3/water/WaterFilter.java