Christmas cactus is a delicate plant that requires a certain amount of care, including the amount of sunlight it receives. Generally, Christmas cactus should be placed in an area that receives partial sunlight, rather than direct sunlight, to avoid damage to the plant. However, in some cases, Christmas cactus can tolerate full sun, but this is not recommended for prolonged periods of time as it can lead to wilting, discoloration, or even death. It's best to experiment and find the ideal amount of sunlight for your particular Christmas cactus to ensure healthy growth and blooming.