Good light is the most important ingredient in a photograph.
This seems obvious, but perhaps not.
Manu Smith-Palomeque asked, on an online forum, the following question:
Q. Key To A Photograph In ONE word......no more..! What makes an excellent photograph?1
There were seventy-one responses.
Only four people mentioned light.
Of these, none snuck in an extra word by adding adjectives such as good light or great light.
Let's say you're photographing a rose bush in bloom.
The rose was grown from a cutting you made from your great-grandmother's garden.
Her mansion and garden have since become a condominium development.
The light is poor, but you photograph anyways.
You could have waited for the light to change, but you didn't.
A few weeks latter, at the K-Mart garden center, you photograph another rose.
The plant needs to be watered, and it's a common rose.
Yet, sentiment aside, the photograph is better than the one using poor light.