Hamsters don't like being exposed to sunlight. Hamsters are nocturnal animals. In their natural environment, they tend to be active at night and hide in secluded places to rest during the day. Thus, they are highly sensitive to light, especially intense direct sunlight, which may make them feel uncomfortable or even stressed. Prolonged exposure to strong light may cause eye problems in hamsters, such as conjunctivitis or cataracts.
However, this doesn't mean that hamsters don't need sunlight at all. An appropriate amount of natural light is beneficial for hamsters. It can promote the synthesis of vitamin D in their bodies, which helps with calcium absorption and bone health. It also has a certain bactericidal effect, reducing the probability of hamsters getting bacterial diseases. Moreover, it can improve hamsters' mood and make them more active. For hamsters, gentle, indirect sunlight, such as the light filtered through curtains or shade nets, is acceptable.
Therefore, when raising hamsters, it's important to avoid direct sunlight but provide an appropriate amount of indirect sunlight. At the same time, closely observe the hamsters' reactions to ensure they can enjoy the light comfortably.