When keeping goldfish, it is best to use a full-spectrum lamp and be close to the sun. When the goldfish bowl can't get sunlight, metal halide lamp or LED lamp can be used instead of sunlight. When choosing a lamp, you need to be careful not to choose a red lamp, because this kind of lamp has no other function except to make the goldfish look better temporarily.

At the same time, when using light to illuminate goldfish, choose the appropriate wattage light according to the density of goldfish, and it is best to turn off the lights at night so as not to affect the rest of goldfish. The light used in the fish tank should not be too strong, otherwise it will also affect the health of goldfish and even make it blind.