| 摘要 |
An LED unit includes an LED and a lens receiving the LED. The LED includes a chassis, a base on the chassis and an envelope fixed on the base. The lens has two crossed grooves, a hole and a chamber sequentially defined in a bottom face the lens, along an upward direction thereof. The chassis of the LED can be selected to fit in one of the two grooves. The base of the LED is engaged in the hole of the lens, and the envelope of the LED is received in the chamber of the lens.
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