LED的光色也不尽如人意。由于它的白光偏蓝，其他的颜色也比传统灯泡逊色不少。
LEDs also have problems with light color-their whites appear too bluish and thereby render other colors poorly compared to traditional bulbs.
这些灯泡是被设计来滤除黄光谱，因此发出一个白光增加能见度的夜晚。
These bulbs are designed to filter out the yellowish spectrum, hence emitting a whiter light which increases visibility at night.
在相同测试环境条件下，对铜基板和铝基板封装的大功率白光LED灯泡的光电参数，以及其点亮后温度的变化规律进行了研究。
The photoelectric parameter of copper and aluminum plate substrate high-power white LED bulbs and its discipline of the temperature change were studied in the same test conditions.
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