Cats need to sleep in the dark because they are nocturnal animals and can move around normally at night with the help of dim light, much like during the day. This is related to the luminous blanket structure in front of the retina of a cat's eye, which improves the utilization of light. However, cats still need light for night vision; they cannot see if it is completely dark. Therefore, owners don't need to worry about turning off the lights causing inconvenience to their cats, and it's also an environmentally friendly practice to save energy.



Cats generally sleep during the day and are more active at night. Even if a pet cat can't sleep at night, there's no need to turn on the lights, as it can clearly see the room. Turning off the lights at night helps cats establish their own sleep-wake cycle by clearly distinguishing between day and night. Keeping the lights on all the time will prolong the daytime and prevent the cat from relaxing. Following natural rhythms and turning off the lights at night is better for cats. However, if a newly adopted kitten is not yet used to its new environment and is timid, turning off the lights at night may make it more anxious and unable to rest properly. In this case, you can leave a warm light on for the kitten; it won't be too bright but will clearly illuminate its surroundings, making the kitten feel safe.