The fixtures on the fixture mounting surface and the ceiling of the building are commonly referred to as ceiling fixtures. The ceiling fixtures are used to provide indoor ambient illumination. The light sources that can be used in indoor lamps include ordinary incandescent bulbs, fluorescent lamps, high-intensity discharge lamps, and tungsten halogen lamps. Different lighting sources have different places for ceiling lamps. The ceiling lamps using fluorescent lamps and incandescent lamps are mainly used for home lighting, classrooms, office buildings and other places where the spatial height is about 3 meters, and the power and light source are relatively large. High-intensity gas discharge lamps are mainly used for lighting in sports venues, large shopping malls, and factory buildings with floor heights of 4 to 9 meters.
In order to obtain sufficient brightness at the work surface while saving energy, the preferred products for homes, schools, shops, and office lighting are fluorescent ceiling lamps. The fluorescent ceiling lamps that are widely used should meet basic safety requirements.
Lamp main safety requirements and electromagnetic compatibility requirements
1. The sectional area of ​​the internal wiring sectional area/external wiring of the luminaire should be greater than 0.5mm2/0.75mm2.
2, lamps should be able to use durable. Lamps that use fluorescent lamps should use ballasts that can not only function normally under normal conditions, but also provide abnormal protection in the event of lamp aging or damage. Incandescent light bulb housings, lampshades, insulated lampholders, etc. shall not be charred or deformed during the durability test.
3, enough creepage distance and electrical clearance.
4. The insulating materials of the main safety components in the lamps should be heat-resistant and fire-resistant.
5, lamps should have sufficient protection measures against electric shock.
6, lamps should have a reasonable structure design and complete processing technology.
7. The electromagnetic disturbance of the luminaire should be within the limits specified in the standard.
8. The harmonic current of the lamp should be within the limits specified by the standard.
How to buy ceiling lamps
Ceiling light fixtures are often used in homes, offices, conference rooms and other places. When purchasing, the safety and quality of the light fixtures should be considered first, and then consideration should be given to the size, height, and function of the room.
1, into the regular shops, buy regular goods, formal invoices, do not buy the price of too cheap products, buy a "three guarantees" commitment to the product.
2. Advertising is for reference only. It is very important to consult the inspection report. In particular, check whether the items such as protection against electric shock, durability test and resistance to combustion are qualified in the inspection report.
3, should look at three when purchasing. A look at the product identification is complete, regular product identification is often more standardized, at least should mark the following: trademark or factory name, product model specifications, rated voltage, rated frequency, rated power. Check whether the product model conforms to the model specifications of the inspection report and the safety certification certificate, and whether the electric parameter is correctly identified. Second, look at the lamp power line, the cross-sectional area of ​​the conductor should be ≥0.75mm2. Third, look at whether the lamp charged body is exposed. After the light source is installed in the lamp holder, the finger should not touch the live metal lamp holder.
Use lighting instructions
1. After buying the lamps and lanterns, don't try to install them first. You should look carefully at the markings on the lamps and read the installation instructions. Install the lamps in accordance with the instructions in the manual. Use the lamps according to the rules in the manual.
2. According to the light source parameters provided by the logo, replace the aging lamp in time and find that both ends of the lamp are red, and when the lamp does not light up, the lamp should be replaced in time to prevent the ballast from being burned.
3. Care should be taken during cleaning and maintenance. Do not change the structure of the lamp, or replace the parts of the lamp. After the cleaning and maintenance is over, the lamp should be installed as it is. Do not miss or replace the lamp components.
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