One class: made by the straw hat small power LED, LED energy-saving lamps, power RC step-down circuit. Straw hat LED continue to use the indicator LED package epoxy encapsulated, making the LED chip unable to shed heat, the light fades serious, a lot of white LED in the use of a period of time, the color temperature becomes higher, slowly into the bluish , led mood lamp, become dim. Factory efforts in the development of low-light decay straw hat LED, but the absence of changes to the package still did not change much, the light fades. These energy saving LED lighting products, is a transitional product, the price is low and of poor quality.
5050 SMD LED energy-saving lamps two categories: power LED made in 3528 or 5050 LED energy-saving lamps, led mood lamp, power is also commonly used resistive and capacitive step-down circuit, there are local manufacturers to adopt the constant current circuit, compared to the straw hat LED Post piece LED heat slightly better substrate for export with the aluminum plate, led mood lamp, can a local heat. However, due to the heat of the LED or ignored, in power SMD LED energy-saving lamps, no radiator, and as usual the use of plastic shell, the light fades is still serious. RC Buck low-end power grid voltage instability, the current shake, brightness shaken moderate price.
Three categories: made by high-power SMD LED, LED energy-saving lamps, power supplies commonly used constant current isolation circuit that is a constant current, such as 5W LED, usually 5-watt LED chips in series, with constant flow of 300mA of current source power supply, wide voltage power grid shaken when the current does not change, the luminous flux that is, to maintain a constant brightness, 5 SMD LED welding above the aluminum plate, aluminum plate and then separated from the radiator, the use of heat as quickly dispersed, to ensure that the temperature of the LED chip is less than the LED junction temperature allowed in order to ensure the true useful life of the LED energy-saving lamps. Such high price of LED lights, led mood lamp, good quality, LED energy-saving lamps to carry out the direction.
LED energy saving lamps, small size, high luminous efficiency, long life, low power consumption, the use of lunch, etc. was a vast consumer favorite. So far, LED energy saving lamps have walked into the thousands of families, but the LED lighting market is not very mature at this stage, various manufacturers specification different country specification of the LED high bay lighting has not been introduced, which also limits the LED lighting market well-being carried out.