Avoid glare of the glare of the lamp and reflection of the illuminated surface. For ordinary indoor lighting (such as roof lights), these problems are generally not available. However, for table lamps, the glare at the lamp head and the reflection on the illuminated surface are very common. The glare and glare of the glare can cause obvious damage to the eyes. The user can adjust the illuminating position of the lamp head and the reflection of the illuminated surface by adjusting the irradiation position and the irradiation angle of the lamp cap, which can be generally achieved by visual inspection.