In the crowded market of LED, the consumers can only select the best price ratio in their purchase of the lamps and lanterns products in calm through knowledge and reason.
LEDs with diversified luminous intensity are usually priced differently; the higher luminous intensity level, the higher price. Those LED for light bulbs must conform to Laser product compliance level I standards.
2. Electrostatic Discharge Performance (ESD Simulator)
LEDs with higher ESD relatively possess a longer life and therefore are more expensive. Generally, only those with ESD over 700V can be used on lighting products.
3. Wavelength Consistency
Only with the same wavelength can the LEDs show a unified color, which means those with outstanding color consistency are more expensive. Without a spectrophotometer, it can be difficult for the manufacturers to provide uniform color.
4. Reverse Current
LEDs are emitters with unilateral conductivity, so reversed current suggests current leakage ( Leakage Current Test ). LEDs with greater leakage current usually last for shorter usage life and thus are cheaper.
5. Beam Angle
Different beam angles are required in different application scenes. LEDs with special beam angles or all-around diffuse reflection features are more expensive.
6. Usage Life
Usage life ( LED Life Test ) defines quality of LEDs. It depends on luminous flux maintenance. The desirable LEDs with smaller scale of lumen maintenance and longer usage life are more expensive.
Chips are emitters of LED. Prices of chips significantly differ by location of production. Those produced inJapan or theUS are more expensive while those fromTaiwan or the mainland ofChina relatively cheaper.
8. Chip Scale
Chip scale can be measured by its side length. Generally, the quality of larger chips are generally regarded to be better and the larger the chips, the more expensive.
Standard LEDs use Expoxy Resin as antimony. Those with extra ultraviolet resistance and fireproof features that are specially designed for quality outdoor lighting are more expensive. Different ways of product design are required for different applications. The reliability design of LED products covers aspects of electrical safety, fireproof safety, application environment safety, machinery safety, healthy considerations, safe usage life, and so on. Note that the design must conform to the local or international electrical safety standards.
To account for health effect of LED ( LED Test Instruments ) lighting, products made of nontoxic materials are more expensive. Taint but cheap products should be avoided, especially for interior lighting. So far, only a few manufacturers have made nontoxic products, which can be identified by the odor. Smelly ones are much cheaper. Some of the toxic materials, such as lead, cadmium and mercury, are only identifiable through professional analysis. To account for the application environmental safety, reliable protection from dust, moister, fire, ultraviolet and low temperature will be associated with higher price.