But that may not matter too much. Lasers are more efficient than xenon lamps, which waste a lot of energy as heat.

不过瑕不掩瑜，激光的效率比氙气灯高，因为后者的能量很多以热能的形式散失了。

youdao

At home, it is a good idea to use energy-efficient lamps with a higher proportion of blue light during the day, and in the evening use ones with the lowest possible amount of blue light.

白天在家里使用蓝光度较高的节能灯是个好主意，在晚上则使用蓝光量可能最低的节能灯。

youdao

In the town of Novigrad 2,300 old street lamps were replaced by new energy efficient ones, reducing the town’s energy costs and light pollution.

在Novigrad镇，新的节能灯替换了2,300个老式街灯，从而减少了该镇的能源费用和照明污染。

youdao