It depends on their environment. If the living environment of parrot fish is full of natural light, it is best for them not to turn on the lights. Because natural light is most suitable for parrot fish growth, and natural light can help them sterilize and reduce the occurrence of diseases. Therefore, in the case of sufficient natural light, it is best for parrot fish not to turn on the lights.

But when the parrot fish cannot receive natural light, it is best to turn on the lights. Because they need light to synthesize pigments, if they can't receive natural light, they need to use light instead.

The time for parrots to turn on the lights can be determined according to the specific environment in which they grow. If the environment in which they grow can receive natural light, but the light is not enough, the breeder can turn on the lights for about 1-2 hours every day. If the parrot fish grow in an environment that does not receive natural light at all, the breeder needs to turn on the lights for 3-5 hours every day.

Parrot fish is sensitive to light, so breeders should not turn on the lights for too long every day. If the ambient light in which parrot fish grow is sufficient, the breeder should also keep them out properly to avoid discomfort caused by long-term light.