Using reflections of light on water from the sources like sun or street lights in photography can lead to some amazing images at times. Using water as a reflective surface for sources of light can convert a common scene into a work of art.
Though reflections in photography can be annoying, but creativity depends on the photographer being able to see things differently and selectively. The practice of using reflection in an artistic way or as a source of lighting can help take one's photographic skills to the next level.
The ideal situation for water reflection of sources of light is when direct light is reflected in water which is either still or rippled gently. There is a glistening effect as water bends the reflected light coming off its surface.
The main point in such photographs is keeping the camera in the low level position close to the water surface to capture the play of water and reflected light. Experiment a bit to make reflection as a creative addition in photography.
Some good reflective shots can be taken at dawn, dusk or night that involve reflection of light from water by using a camera mounted on a tripod with a long shutter speed to make the water give silky effect. This works best if the water is reflecting lights such as sun, streetlights, lamp posts or illuminated colourful landmarks. The slower shutter speed blurs the water's motion rather than freezing it to provide a surreal appearance.