Taking well-lit photographs on location can be challenging, especially if the assignment involves outdoor portraiture. While the sun pumps out ample volumes of light 24/7 (daylight balanced no less) it's not always positioned where you want it or when you want it. And then you have the rain, snow, and cloud factor. In any case, when shooting outdoors on location, the sun is your primary light source. Beyond that, it's all about you and your choice of portable lighting.