这是比赛的堕落灯源图像。
尽管LED灯比白炽灯利润空间更大，但灯源替代市场钟会趋于缩小。
Although LEDs will be more profitable than incandescent bulbs the replacement market will eventually dwindle.
使用大量的自然光也会减少特定建物里的灯源需求，进而降低电费。
Large amounts of natural light will also reduce the need for lighting in a given structure, thus reducing utility costs.
应用推荐