This can be a great opportunity to play with silhouette and long shadows in your photography.
Backlit photos are when the light source is behind the subject, with the subject in between the light and your camera. This can be a great opportunity to play with silhouette and long shadows in your photography. The potential downside to backlit photos is that the white balance will be off, resulting in a loss of detail in your subject. This works well for silhouettes, but if you still want to see some detail on your subject, this is the time to pull out your light diffuser to reflect some of the light from the background onto the front of the subject.