Concealed Led Ceiling Lights

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FAQ

Secret LED bulb bubble price difference why so big?
Lamp beads。 I also do with Samsung bulb, bulb, lamp light cost more than others product price;
LED thread specifications for bulb bulbs?
Specifications also include bulb, E27, E26, B22, E14, G10, E40;E27 specifications are in the majority.
What is the AC voltage of the LED bulb?
The conventional way to make multiple voltages is the 90V-240V ~50/60HZ 12V
LED bulb bulbs, do you need 3C certification now?
Light source class is impossible to do, only lamps and lanterns class can do. For example, flat lamp, ceiling lamp and so on...However, CQC voluntary certification can be done.
Detailed description of LED bulb lamp
A bulb can be said to be the highest cost of the driver, not the driver, light is not bright. And for the quality of a ball bubble
How to choose the bulb power?
If the public is not high, the quality requirements, and to control the price, you can choose non isolated, because it does not require isolation transformer, so the cost is relatively low, but the aluminum substrate voltage requirements is relatively high, otherwise there may be charged radiator, and still light outside is not very beautiful.
What are the types of LED bulb?
According to the radiator shell to points, can be divided into plastic shell, aluminum radiator and ceramic shell, in general, the ceramic shell heat radiator is best, but the price is relatively expensive, the widespread use of aluminum shell, moderate price, good heat dissipation performance
LED bulb after the power failure, still glimmer, can last hours or even all day, what is the reason?!
The meter usually doesn't turn because the current is too small to drive the meter (Mechanical), of course, the electronic meter also depends on the sensitivity. I don't think so. At least I used to do LED (light power about 0.5W it) is equivalent to 3W incandescent lamp brightness around. The meter does not rotate when it is shining normally.