Common standard sizes and parameters of LED downlights:
2.5 inch LED downlight size parameters: opening (Φ80) - table page size Φ102×H30 power 3W
3-inch LED downlight size parameters: opening (Φ90) - table page size Φ112×H30 power 5W
3.5 inch LED downlight size parameters: opening (Φ100) - table page size Φ122×H30 power 7W
4-inch LED downlight size parameters: opening (Φ120) - table page size Φ146×H30 power 9W
5-inch LED downlight size parameters: opening (Φ150) - table page size Φ180×H30 power 12W
6-inch LED downlight size parameters: opening (Φ160) - table page size Φ190×H30 power 15W
Common classification of LED downlights:
1. Classification by installation method: embedded LED downlights and surface mounted LED downlights;
2. Classification by light source: divided into LED SMD light source downlight, LED high-power light source downlight and LED COB light source downlight;
3. Classification by place: LED downlights for home lighting, LED downlights for commercial lighting and LED downlights for engineering lighting; Classification by light source anti-fog: common LED downlights and anti-fog LED downlights

LED downlights do not occupy indoor space, and LED downlights are installed indoors. Because of the privacy of the lamps, it will not cause a feeling of oppression, on the contrary, it will produce a warm effect. Therefore, home improvement can choose to install multiple downlights to reduce the sense of space oppression. Generally, LED downlights are used more in hotels, homes, cafes, and shopping malls.

