It can be installed on the ceiling, above the head of the bed, in the cabinet, and can also be hung, floored, or suspended in the air. The feature of the downlight is that the light source is locally illuminated and freely scattered from top to bottom. The light source is closed in the lampshade. Its shapes include tube downlights, sleeve downlights, flowerpot downlights, and concave shapes. The trough lamp and the wall lamp can be installed in the porch, living room and bedroom respectively. For example, a green porcelain shade is installed next to the TV to illuminate the wall lamp, which can clearly see things without affecting watching TV. A sleeve-type downlight is set above the sculpture, which can direct people's sight to the artwork, which is convenient for taste and appreciation. When choosing a downlight, the wattage should not be too large, it is only for illuminating, not glare.