The default light set is an ambient light set made of 3 separate lights. The lightbulb on the light controlls tells you it's an ambient light. if you click on it you will get the Light Controlls Dialogue Box there you can make it into a spot. This ambient light is still directional and can cast shadows so it isn't like an ambient light in some render engines that cast light evenly in all directions, so in some cases you must use several lights. Also to fake radiosity (bounced light like the sun bouncing off a floor onto a wall) you'll have to use multiple lights. One thing you can also do to cut renders is to turn shadows off. You can also decrease the light's map size, select the light then look at the dials for the light. The larger the map size the more detail in the shadow map it creates but also the greater the render time. Hope that helps. A lot of lights isn't necessairily