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The other is a direct constant current power supply, LED is in series or parallel. Its advantages are low cost, but the flexibility is poor, also need to solve a LED failure, does not affect other LED running problem. These two forms exist in a period of time. Multi-channel constant current output power supply, in terms Cheap LED Bulb of cost and performance will be better. Perhaps it is the future direction of the mainstream. Development tendency of LED bulb Lights must choose the kind of engineering plastics flame retardant plastic case type. Ordinary plastic deformation and flammable, is prohibited for the production of energy-saving lamps. Can be simply determined from the surface of both, the latter surface is smooth, shiny, like frosted glass former LED Bulb Price surface texture. Lights housing must be the kind of engineering plastics flame retardant plastic case type. Ordinary plastic deformation and flammable is prohibited for the production of energy-saving lamps. It can be simply determined from the Buy LED Bulb surface; the latter surface is smooth, shiny, while the former surface like frosted glass texture. Working Temperature LED energy-saving lamps in normal working condition, its temperature should be low. Otherwise, LED energy saving lamp life will be very short. Meanwhile, when the energy-saving lights have quickly flashing, either very harsh fluctuations, then it means that there are problems in the LED Bulbs Sale quality of energy-saving lamps. Start Performance LED energy-saving lamps start with two characteristics: First, the higher the temperature is, the easier to start; Second, when turn off the lights, it do not flash. Also worth mentioning is that many LED lamps is very dark when opened, which is detrimental for lamp life, LED energy-saving lamps shall be provided with power supply circuit and PCB board in its interior. Interference In China, the electromagnetic compatibility is one stander that electrical project must have; however, this project is very complicated to detect. myledgrowupanty 140707