1. Opening dimensions of 5-inch downlights
The lights produced by each manufacturer are different, and the opening size will be different. If the product is standard, the opening diameter is135-145 mm.
Do ordinary downlights come in large (5 inches) and medium (4 inches)? Small (2.5 inches)? Three sizes.
The latest specification classification of downlight
1, divided by device type: embedded downlight and surface mounted downlight.
2. According to the arrangement of lamps, there are vertical downlights and horizontal downlights.
3. According to location: household downlights and engineering downlights.
4. According to the number of light sources: single plug downlight and double plug downlight.
5. According to the anti-fog situation of the light source, it can be divided into ordinary downlights and anti-fog downlights.
6, according to the size: 2 inches; 2.5 inches; 3 inches; 3.5 inches; 4 inches; 5,6,8, 10 inch. Inch refers to inch, which refers to the caliber of the reflection cup inside.
Optional models: vertical straight thread downlight, vertical straight thread downlight, horizontal straight thread downlight, anti-fog horizontal straight thread downlight, anti-fog vertical straight thread downlight, anti-fog vertical straight thread downlight.
Second, the size of the downlight.
Downlights are usually fixed in size. According to the basic installation mode of light source, downlights can be divided into horizontal downlights and vertical downlights.
The main dimensions of vertical downlights are: 2 inches, 2.5 inches, 3 inches, 3.5 inches, 4 inches, 5 inches and 6 inches; Horizontal downlights are usually large in size, concentrated in 4-inch, 5-inch, 6-inch and 8-inch, and also have 9-inch, 10-inch and 12-inch.
2.5 inch is generally used in counters, shoe cabinets, wineries, high-end wardrobes, etc. Only in places with small local space and fine irradiation requirements. Bakeries, shoe stores and shopping malls generally use 3 inches, 4 inches and 5 inches. 6-inch and 8-inch downlights are large-size exposed downlights, so they are generally placed on relatively high ceilings. The power that a 6-inch downlight can achieve is 18 watt, and the maximum power of an 8-inch downlight is 2 1 watt. In large shopping malls, shopping malls, stations and subway stations, you can see a white light protruding from a distance, that is, an 8-inch downlight with LED exposed. 10 inch surface mounted downlight is a special model.
3,4-inch downlight opening dimensions
Common dimensions of downlight openings are: 2 inches, 2.5 inches, 3 inches, 3.5 inches, 4 inches, 5 inches, 6 inches and 8 inches. Inch here refers to inch, not the ancient unit of length measurement, such as inch, ruler and ruler. 1 inch =25.4 mm =2.54 cm (1? Inch =? 2.54 cm)
Therefore, the opening size of 4-inch downlight is about 10cm, and 4-inch =4×2.54= 10. 16cm (about 10cm? =? 100 mm).
Civil 4-inch downlight (φ 125? ) The opening size is generally φ 145× 100h, and the project 4-inch downlight (φ 1250) is generally φ 145× 150h.
The above small series mainly introduces the dimensions of downlights, including the opening dimensions of 5-inch downlights and 4-inch downlights. Downlights generally have a screw cap, which can be directly installed with incandescent lamps or energy-saving lamps. The difference in specifications and sizes is mainly manifested in the diameter of the opening, and the diameter of the opening corresponding to different models will be different. It needs to be analyzed according to the actual situation, or the manufacturer's standard and product parameter identification, otherwise it will be chaotic.
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