| 摘要 |
A dual lighting LED is provided to maintain an optimal brightness by arranging a plurality of red and yellow LEDs across on a PCB of a unit lamp. A unit lamp is composed of a plate(15) and a cover(10). The plate supports a PCB in which a plurality of LEDs are mounted. The cover is installed at a circumference of the plate to improve identification by preventing the light of the LED from spreading to the circumference. A red LED and a yellow LED are uniformly arranged across on the PCB.
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