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

Let LED down light up continuously for several minutes, feel the temperature, touch the radiator, LED lamp behind the hand, such as hot feeling pain, showed that LED downlight overall temperature is too high, easy to damage. The quality of the product is considered substandard.

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

Between general 7-12W hole 9.5 cm can be chosen, the LED lights our company own, opening 9.5 cm, 9-12W, 7W ceiling light is also your choice, to choose a bright power point, brightness not too big, choose a smaller power good 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:Excuse me, how many different sizes for LED lamp lumens

See customer needs and in what place, with the output of the LM itself and quality of reflective glass beads, beads arranged, there is a direct relationship between the transparent mask

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

You should use big ones. My home is small, 5W's PL*D005

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

LED lamps are not in good order, so the government's attitude is right. Now the LED lamp light is concentrated, contrasting. Environmental protection, without mercury (Hg) and other harmful substances to the environment, will not cause damage to the environment. LED lamp assembly can be easily disassembled, no manufacturers recycling are available through other people recycle. LED does not contain infrared and ultraviolet light, so it does not attract insects. LED downlight is a photoelectric (www.heg-led ) of LED lighting products specializing in the production of a series of novel styles, are sought after by consumers. Specific details, you can understand, and I believe it will be of great help and inspiration to you.

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:The difference between ordinary LED lamp and LED downlight and integration of advantages and disadvantages

Energy saving: the energy consumption of white light LED is only 1/10 of incandescent lamp and 1/4 of energy-saving lamp

Q:The opening 7, 5 cm height of the LED lamp, home decoration into the floor with fear of hydrochlorothiazide

Suggest you go to Taobao search, you say the kind of description, there are all attributes. Because you say too many varieties, I don't know what you're talking about

Q:Led downlight and LED flat lamp that is durable

The theory is the same is led beads, but life is not long also depends on the heat dissipation effect of the product can solve the product solution that life is relatively a little longer you can see 100 lighting