Led lamp string device in which the led lamp assemblies have roughly the same shining luminance, and its realizing method

a method to enable the shining luminance of led lamp assemblies of led lamp string:

• device to be roughly the same with the aid of respective decorative covers, based on the said LED lamp string device comprising LED lamp assemblies and a power supply module, said method comprising the steps of:
• a) Let LED luminous bodies of different colors which are mounted in said LED lamp assemblies, be lighted normally under their rated conditions, and evaluate their luminance respectively, and sum their luminance up as difference levels;
• b) Define the corresponding relation between said luminance of LED luminous bodies of different colors and the color of light emitted by the LED luminous bodies, based on the above-mentioned different luminance levels;
• c) Make decorative covers using different materials that have different transparency, and let the rate of transparency of said decorative covers correspond with the above-mentioned light-emitting luminance levels of said LED luminous bodies;
• d) Put said decorative covers onto suitable LED luminous bodies respectively based on the inverse relation between said transparency of the decorative covers and the luminance of said luminous bodies, i.e. the decorative covers with higher transparency are put onto the LED luminous bodies with lower luminance, and the decorative covers with lower transparency are put onto the LED luminous bodies with higher luminance so as to make LED lamp assemblies covered with suitable decorative covers have roughly the same shining luminance.