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:Excuse me, how many different sizes for LED lamp lumens

If you want to output LM, we must first choose high light efficiency of the lamp, this problem because there is no explanation for what your power and lamp type lamp, so I can not estimate

Q:Why use LED lamp light source patch

Chip heat dissipation is better than plug-in, long life

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

It can be installed LED fluorescent lamp and LED lamp. The lamp power within 12-20w, ensure the light illumination to 150-250LUX office. The brightness of the corridor can be slightly darker, with 3-4 inch LED lamp, lamp power at 6-12W, the light illumination to 70-120LUX, with the Q I can. Answer for you, so doubt

Q:How to choose the right LED downlight

Look at the radiator lamps: cooling speed determines the degree of attenuation of the whole lamp and the service life of the radiator is too small will accumulate in the light of internal temperature. Light long time working under the condition of high temperature, light decay very fast, life is short. Our shell and radiator are all thick materials to ensure heat dissipation.

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

According to the instruction, the hole is opened on the ceiling with an openerThree: after opening the hole, pull out the wire, then connect the drive and the lampPay attention to the positive and negative poles of the lamps and lanterns, the ground mark of the lamps and lanterns, and correctly install the ground wirePay attention to the distance between the fixtures and the wall or the wall so as to facilitate the heat dissipation of the lamp

Q:Turn off the lights after the bright LED lamp

Because the electrician is working on the power off switch, the power switch is a zero line, not a live wire. Electricians know that the power switch must be cut off by the line of fire, and no danger of electric shock is announced. If the power switch is on fire line, after the power is cut off, the FireWire will continue to supply power to the LED driver. Therefore, the LED lamp will have a faint light when the switch is turned off.

Q:What is the difference between the LED and the LED lamp ceiling lamp

Specific point is, smallpox lamp, general light source and lamps and lanterns sell together. You are your own choice by light source lamp, but it is still about the same. The key depends on what kind of effect you use

Q:The general living room to Amdo large size of the lamp?

Now more and more office and family on the use of LED lamp lighting, size depends on the specific size of the size of the living room, the living room, a dozen centimeters can, do not need too much.Because of the more and the applicability of the LED lamp used in indoor lighting more people know, is becoming more and more popular. becauseLED 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 lamp, do not use the pressure. Forced feeling, on the contrary will produce a warm effect.So you can choose to install multiple lamp decoration lamp, reduce the pressure of space. A sense of urgency.

Q:Common questions about LED downlight spotlights

Currently on the market Jiezhuang LED downlight is 12--24 DC drive, just some built-in drive, directly connected to the 220V power supply, there is need to use power.