US Patent 10274191 Ventilation illumination device

A ventilator illumination device, including a light-emitting module for housing a light-emitting unit and a power box module for housing a power supply supplying direct current for the light-emitting unit, wherein an anti-reversal installation structure is provided on the light-emitting module and the power box module, the anti-reversal installation structure limiting the light-emitting unit to be installed only in a state that the light-emitting unit faces towards one predetermined direction. The illumination device is easy to install and prevents inversion of the light-emitting unit, thus ensuring proper brightness of the light irradiated by the light-emitting unit into the room.