countries that have no standards within the industry standards: 1000 a small decline to zero. 3000 small-time decline of 1% 10,000 small decline of 3%. 50,000 small decline of not more than 30% can be. In general to achieve the above bad light manufacturers are fairly regular manufacturers. Many manufacturers use the outside is not very good chips. To get a good LED suggest you go to the national three ministries winning 28 LED lighting business to buy.
2. the US Energy Star standards
no national standard, refer to the US Energy Star LM-80 standards. 6000 hours, the luminous flux maintenance rate ≥94.1%.
LED lamp beads Introduction and Features
LED light-emitting diode lamp beads is the abbreviation abbreviation LED. Following is a LED lamp beads features:
– Voltage: LED lamp beads using a low power supply voltage between 2-4V, varies depending on the product, so it is than using a high voltage power; more secure power supply, especially for public places;
– Current: working current 0-15mA, brightness increases with the current variable
– Effectiveness: 80% reduction in energy consumption compared with incandescent light efficiency.
– Applicability: small, small piece of each unit LED is 3-5mm square, it can be prepared into various shapes of devices, and for the environment variable.
– Stability: 100,000 hours, the light fades to the initial 50%.
– Response time: incandescent response time of milliseconds, the response time of the LED lights nanosecond.
– Environmental pollution: no harmful metal mercury.
– Color: change the current can change color, light-emitting diodes by chemical modification methods, adjust the material band structure and band gap, to achieve multi-color light orange red Huanglv Lan. As for the red LED, as the current increases, it can turn to orange, yellow small current, and finally to green.
– Price: LED lamp beads cost price corresponding to the traditional new sources for more expensive, compared to incandescent lamps, dozens of white LED price with a price of incandescent lamps considerably, and often each signal to be 300 to 500 diodes.