| 摘要 |
An LED tube lamp includes a heat sink, an LED substrate, a cover fixed to the heat sink. A light gathering wall arranged between the cover and the LED substrate. The cover further includes a condenser lens, the light gathering wall is configured for reflecting and gathering the light beams emitting from the LEDs, the condenser lens is configured for gathering the light beams reflected from the light gathering wall. The light beams emitting form the LEDs can be controlled substantially in a desired illuminating range after being gathered twice.
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