In general, your photos will be better if there’s plenty of light - preferably daylight. That’s because light affects colour - you can’t see colours in the dark, and nor can a camera. Good contrast makes good photos - aim for a range of light to dark. Shadows can add interesting element to a photo.
For these shots I used a slightly slower shutter speed and didn't worry about blur - I was trying to capture the atmosphere in a creative way rather than capture a perfect image.