Q:How are LED lamp quality is good or bad?

1, in the purchase of LED lamp, can take a look at the lamp appearance, the lamp body is smooth, there is no scratches, the overall feeling is good, good LED downlight will feel heavy, because the use of the material and the radiator will be better.2, LED will take in the hand shaking force lamp, listen to whether there is noise, such as abnormal sound that no internal fixation downlight, there are security risks, for the unqualified products.3, light LED downlight, using a mobile phone camera function close to the light emitting surface to see whether there are such as flicker, flicker, the LED lamp is equipped with a power supply for the low-end products of inferior quality, affect the overall quality of LED downlight.4, the same LED lights lit up at the same time several manufacturers of the same type lamp, observe its luminous color and brightness is consistent, if not consistent is obvious, as inferior, because the same LED lamp manufacturers with the same type of products can not be light color and brightness inconsistency

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:Led downlight can light panel directly with intelligent dimming Mody?

We live by 220 volts of alternating current, and LED by direct current. So all the LED lights will be fitted with a driver to change the current and the voltage. LED lamp dimming according to the change of current or voltage, so Led can directly drive panel light lamp dimming and decided to use intelligent downlight! Ask the supplier can, but generally adjustable lamp will be specified, because the adjustable light is not adjustable to your light!!

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

The three three watt brightness is enough, and the five watt is a bit wasted

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

Ha ha, we should consider the problem of heat dissipation, ah, is the light will heat

Q:LED ceiling lamp and LED downlight what is the difference

Is owed to the concealed downlight, diffuse light, mainly regulate the indoor light effect, and spotlights are surface mounted, direct light, mainly to highlight the background picture or object, two lights are installed at the top of the.

Q:What is the size LED downlight

Buy downlight, mainly look holes, we routinely say how many inches, refers to the opening.

Q:Turn off the lights after the bright LED lamp

Of course are,,In addition, a lamp, and if it is warm white downlight, 7W interval of 1.8 to 2 meters with a 9 watt meter interval, 2 to 2.5 meters in 1, because of the warm white Led light dark light.. If the daylight color (white) led lamp, high point to spacing of 7W or 9W, every 2 meters to 3 meters with a, above two, today I am in the company installed, the effect is very good, very bright, with a larger spacing proposal, after all Led lamp is more expensive, to avoid wasting the resources that can help you save a lot of money, today I am in the company installed 12.8 meters long * 7.45 meters wide, more than 90 square, 1.8 meters vertical spacing and horizontal spacing of 2 meters with a 9 watt Led lamp with fifteen Led lamp, brightness is bright, do not feel the need so, if you are one hundred square pavement, a lamp should be 20I hope I can help you.

Q:LED downlight, embedded lamps, lamp tube and difference?

No LED lamp lens, no light, light uniformity, light angle.LED recessed lamp is in accordance with the method, there are two types of installation and embedded installation. The recessed lamp is mounted inside the ceiling.LED cylinder spotlights have lenses, focus light, first focus on a place to illuminate, and where the illumination is high.