I always try to present something new. Here is a low - key photograph of a flower. A low-key image is one that contains predominantly dark tones and colours. Like high-key images, they convey atmosphere and mood. But where a high-key image feels airy and light, a low-key is usually dramatic and full of mystery. And where high-key lighting over-lights the subject to reduce contrast, low-key lighting creates striking contrasts through reduced lighting. Shadows are the most important part of low - key photographs.
To create a low-key image, all you need is your camera and one light source. Depending on the results you are looking for, you might also make use of a fill light or reflector.
Now what are the settings important for Low - key photographs???
ISO should be on 100, this gives good quality images rather then grainy or noise - free images. Choice of light depend upon you. The main thing is that the light shouldn't fall on the background.