What causes water leakage in the interior dome light?

[LaCassidy]

Water leakage in the interior dome light may be caused by improper sealing of the sunroof or gaps in the roof lining. More information about interior dome lights is as follows: 1. Interior dome lights are installed in various cabin locations to facilitate safe entry/exit at night and map reading while driving. 2. When designing the layout, the light switch (SW) should be operable from both front and rear seats. SW typically has three positions: ON, OFF, and door-linked mode. To minimize light thickness, 5~10W bulb units are commonly used. For spacious cabin illumination requirements, bulbs with 8~30W power are generally employed.