photography lighting is a most important aspect of photography and lighting or the lack thereof can make or break the look of a photograph. Most times natural light is just about all that you will need when taking photographs and most photographers will rely very heavily on either sunrise or sunset photography lighting conditions to get the best shots.

Heavy midday sunlight is not ideal for photography lighting and is avoided by most photographers, although a novice will generally have a go at it only to find out that not even a polarizer will work at the best of times in midday sun conditions. And if the lighting isn't ideal, if the background is cloudy or overcast, most photographers will also stay away from that too.

However, it has to be said that you can get some great shots from a heavily overcast sky. You just have to know what you're looking for in the end result of the shot.
And finally when all is said and done and photography lighting conditions aren't ideal, if they have the ability to, quite a few photographers will switch to the use of artificial photography lighting.

This could be anything between an on-camera flash, to an off-camera flash, to full blown studio photography lighting. Obviously it depends on the situation and what you're photographing, but for the most part many photographers will only resort to use of this method of photography lighting scene in extreme cases.