Sunbathing through the glass is definitely different from outdoor sun. The outdoor sun is shorter and stronger. I'm no expert. I don't understand. But this is practical experience. Two pots of cattle of the same breed, one basks in the sun through the glass, the other basks in the sun in the open air, flies close to the ground in the open air, and develops upward through the glass. Two pots of the same variety of Tebaixing geranium, one pot is dried through glass, the other pot is dried in the open air, and the leaves in the open air are obvious and solid; Rings separated by glass do not develop color. But in winter, when the temperature is low, you will definitely enter the room. I'm worried too.