Q:There are no holes 7 cm, 9W led downlight

9W downlight generally open hole is 11 cm...Go and look for it on Taobao

Q:How to judge the quality of LED downlight

Determine the quality of LED ceiling lamp lighting effect, the United States and Taiwan LED chip chip chip, domestic chip etc.. Different brands, different prices, lighting difference is also large. Special low price downlight, make many use of chip production line down the defective products, color inconsistencies, brightness difference, short service life, users need to pay attention to.

Q:7 square feet of aisle to install 3 LED downlight, how much w led downlight

My experience with choosing lights was W, and the bigger the headlight. As far as my family is concerned. All unified outfit is downlight 3W downlight. Open your mouth. It's enough

Q:LED lamp power off why would light up

LED lamp power off, will light up, this situation is normal in the 220 electric power supply situation, reason is caused by the distributed capacitance charge discharge line.Because the switch and the lamp is connected with 220V/50Hz AC power supply is normal, directly added to both ends of the lamp, the lamp work light; when closed, switch capacitor and lamp itself and the line is connected to the alternating current of 220V/50Hz, because the distributed capacitance of the charge and discharge can form weak current, the lamp will light.Solution: in the lamp circuit board input end in parallel with a pressure resistance of at least 400V of non-polar capacitor, capacity 0.05 micro method above (if the switch connection is longer, can be appropriately increased).

Q:The office, sample room, corridor, the most commonly used several LED downlight which is several dimensions, what is power?

Big ones. 6 inches. Our company is using this big one.

Q:How to choose the right LED downlight

Look at the power supply lamp (commonly known as: transformer) transformer quality also determines the whole life of the lamp, lamp used more than 50000 hours no problem, but if the transformer is destroyed, the whole lamp will not light up. The electronic components and design scheme in the transformer determine the efficiency, power factor, stability, temperature rise and service life of the transformer. Our driver is wide voltage drive, and the output current and voltage are stable.

Q:LED lamp is mainly used in where

Now more and more office and family on the use of LED lighting lamp. Because of the more and the applicability of the LED lamp used in indoor lighting more people know, is becoming more and more popular. LED has some other lamps downlight incomparable even other LED lamps can not compare the applicability of indoor lighting LED lamp does not occupy the indoor space in the indoor installation of LED downlight, because hidden lamps, which do not use the feeling of oppression, on the contrary will produce a warm effect. Therefore, the home can choose to install multiple lamps downlight, reduce the space sense of oppression. Usually in hotels, families, cafes, shopping malls LED downlight more. Indoor lighting LED lamp has strong applicability, but also because of its many other advantages. 1, the use of LED lamp for home improvement is more beautiful. Downlight help overall unified and perfect to keep indoor decoration, do not destroy the chandelier lamp light source set, hidden in the interior decoration, not exposed, no glare, visual effects LED light giving more soft and uniform. Energy saving 2, LED to help families reduce electricity costs: the same brightness power for the ordinary energy-saving lamp 1/4, a LED lamp can save electricity tens of dollars a month for a family. 3, LED lamp is not fragile, Recyclable, strong environmental protection: do not contain mercury and other harmful substances, no pollution to the environment. And its power saving is equivalent to reducing carbon emissions. In line with the family "energy-saving emission reduction" concept of life promotion. Longevity: LED 4, LED downlight lamp life of 50 thousand hours, six hours a day, is a life span of 20 years. This reduces the cost of buying lamps for families.

Q:LED is not only the benefits of downlight what harm?

And before the benefits of lighting equipment is quite obvious, if you really find faults if I feel bad replacement replacement, light bulb was down for a new can, to LED welding, when the current had a high fever bad replacement is more trouble, but because the LED lamp from the battery or the charging the battery power supply, basically there is no current unstable situation

Q:Excuse me, how to install the LED lamp?

Lamps shall not be covered by any flammable substanceThe wiring of the lamp should not be close to the radiator, and should be avoided as far as possible

Q:What brand of downlight is good? Please explain the reason, thank you!

Value. Of course, a person's life is not all activities, just for money, the pursuit of fashion, to accept new things, but also a way of life!