Taking photos at night requires special settings to increase the aperture ( letting in more light at one time ), reduce the shutter speed ( giving more time for exposure ) and possibly increasing the ISO ( providing more sensitivity to the exposure ). Your camera may handle these settings effectively with a Night Sky Mode ( look for a dark crescent moon or star symbol ). you may choose to alter any or all of these settings manually.
You may also need to consider working on manual focus as in some cases the light may be to low for the auto focus to work. To shoot the sky or horizon, set the focus to infinity.
When shooting at night, the camera needs a bigger, more open aperture -at least f2.8 – thus reducing depth of field. The shutter needs to stay open for at least 1/30 or longer. Recall that objects in motion at this speed will blur. If you want to use a faster shutter speed, you’ll need to increase the ISO – but that in tern may add noise to your image.
To ensure the best night shots you definitely need a tri-pod. Using this will enable longer exposure times and smaller apertures. Use of a self timer as well will also reduce the effect of you physically pressing the shutter button.
As a top tip – try shooting just before dark – neon lights look especially nice just before it gets really dark and a little natural light is left.