Light efficiency This represents the quality of the opt […]
This represents the quality of the optical design and the quality of the lamp used by the manufacturer. The chip manufacturers have many sub-packages and chip chips are the core technology directly affect the luminous efficiency package has a great influence, but at present, except for a few particularly expensive packaging plants are not much worse. In general, the light efficiency of the lamp on the market has exceeded 120 lm/W but this is just a parameter without a lens without a lens. In general, light bulbs with a particularly low luminous efficiency, such as 60-70lm/w, are very poor. Basically, it can be judged as garbage. The corresponding lifespan is not long either. The comparison method is to buy a power meter and insert the same power bulb. If the brightness is weak, it is relatively poor. The brightness of the yellow light please compare with the yellow light bulb. Different colour temperature bulbs cannot be compared without equipment.
2. Heat dissipation
This is very terrible for light bulbs. The basis of heat dissipation is that heat must be conducted to be dispersed. Generally do not buy plastic shell this technology is still a gimmick Please buy aluminum alloy shell as far as possible to choose to touch hot at about 70 degrees, too low not to buy, too hot do not buy. With the same power, the bigger the shell, the better.
3. Color rendering
Not all manufacturers' logos on the shell are reliable. This is a big problem. So try to buy 70 or so. This is a conscience label. If the price of a single light bulb is below 7 yuan per watt but it is marked with a color rendering index (CRI) of 85 and looks very bright then don't buy it as a liar. The higher the CRI, the lower the light efficiency, which is still very accurate at present.
At present, there is no strobe for any reliable driver. At the very least, when you use a mobile phone to shoot it, it won't flash. This is also a good way to test most LED lamps. The mobile camera can reach 24-30fps. If you flash it, then the power supply design of the lamp has either a problem or It is cutting corners.