We can scarcely imagine life without electric light.
我们简直不能设想没有电灯怎样生活。
But tests in Indonesia found that it also had to be readable in low-light situations, like at night in a house without electric power.
但在印尼的测试发现需要在低感光度的环境中可读，如在晚上没有电的房间里。
The traditional pyroelectric sensor (or a sound sensor) and the combination of light source, without reserve electric wire, place the product directly on the lamp and turn on the power.
将传统的热释感应器（或声音感应器）与光源结合为一体，?必预?管线，只须将产品直接安装在灯座上，打开电源即可使用。
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