For lights that turn on and off frequently, or are only on for a few minutes a day (like a light in a closet), an incandescent bulb will suffice.
需要频繁开关或是一天只要开几分钟的地方(比如说壁橱灯),用白炽灯泡就足够了。
2
He worked in a factory, and also as a security guard in Shanghai. But one day, as he was thinking about how he could improve his life a little faster, he had a lightbulb moment.