Whilst many people choose to take photographs during the day, a growing number like to shoot at night or at dawn/dusk.
to be succesfull at night cityscapes you do need some essential gear.
To have the best chance of getting a really great image it pays to scope out your location during the day, this way you dont end up spending precious time looking for the best vantage points as your Sunset slowly dissapears.
The blue hour (from French l'heure bleue;[a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon and residual, indirect sunlight takes on a predominantly blue shade, which differs from the one visible during most of a clear day, which is caused by Rayleigh scattering.
Blue hour usually lasts about 20-30 minutes right after sunset and right before sunrise. For instance, if the sun sets at 6:30 p.m., blue hour would occur from 6:40 p.m. to 7 p.m.. If the sun were to rise at 7:30 a.m., blue hour would occur from 7 a.m. to 7:20 a.m.. Time of year, location, and air quality all have an impact on the exact timing of blue hour.
Photographers cherish blue hour for the tranquil mood it sets. When photographing blue hour it is recommended to capture subjects that have artificial light sources, such as buildings, monuments, cityscapes, or bridges.