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With the arrival of the LED general lighting market in the first year, the proportion of LED lighting fixtures in the overall lighting fixtures will exceed 10. Due to the emergence of high-voltage LEDs, most LED chip suppliers are facing a danger of being out, and the low-voltage LED chips they produce will come. The more difficult it is to sell into the LED general lighting market. High-voltage LEDs will dominate the future LED general lighting market. High-voltage LEDs can bring about an effective reduction in the cost and weight of LED lighting fixtures, but its more important significance is to significantly reduce the design requirements for the cooling system, thus effectively clearing the biggest technical obstacles for LED lighting fixtures to enter the indoor lighting market. High-voltage LEDs have two distinct competitive advantages over low-voltage LEDs. First, at the same output power, the driving current required for the high-voltage LED is much lower than that of the low-voltage LED. For example, the high-voltage blue 1WLED with chip optoelectronics has a forward voltage drop of up to 50V, that is, it requires only 20mA of driving current. It can output 1W power, and the normal forward voltage drop is 3V 1WLED, which requires 350mA drive current to output 1W power, so the high-voltage LED with the same output power dissipates much less power than the low-voltage LED during operation, which means The cost of the heat-dissipating aluminum casing can be greatly reduced. Second, high voltage LEDs can significantly reduce AC-DC conversion efficiency losses. Taking 10W output power as an example, if a 1W high-voltage LED with a forward voltage drop of 50V is used, the output can be configured in 2 and 4 strings, and the forward voltage drop of 4 series LEDs is 200V, which means only from the city. Electric 220V AC (AC) can be bridged and reduced by 20V. But if we use a 1W low-voltage LED with a forward voltage drop of 3V, even 10 series of forward voltage drops are only 30V, which means that we need to step down from 220VAC to 30VDC. The lower the input and output voltage difference, The conversion efficiency of AC to DC is higher. It can be seen that if high voltage LED is used, the efficiency of the transformer can be greatly improved, which can greatly reduce the power loss during AC-DC conversion. This heat loss can further reduce the heat dissipation of the casing. cost. Therefore, if high-voltage LEDs are used to develop LED general-purpose lighting products, the overall power consumption can be greatly reduced, thereby greatly reducing the design requirements for the heat-dissipating casing, and the thinner and lighter aluminum casing can be used to meet the heat-dissipating requirements of the LED lamps, due to heat dissipation. The cost of the aluminum casing is one of the main cost components of the LED lighting fixture. The effective reduction of the cost of the aluminum casing also means an effective reduction in the cost of the overall LED lighting fixture.