What characteristics of street lamp make it a sign of night?

I love street lamps, their due diligence, selfless dedication and perseverance.

When the night falls, the street lamps in the streets and alleys show yellowish light one after another. Although they are not as bright as surgical lamps, they are not as flowing as rainbow, and they are not as warm as heating lamps, but their contributions are epic!

as soon as it gets dark, they light up and light up the road at night with their yellowish lights! Even if it is stormy and thunderous, they are in their posts, day after day and year after year. They have become old and worn out, and the graffiti and peeling paint on their bodies and the not-so-bright lights are the symbols of their old and worn out! Only in this way can they be laid off, and a new successor will come! They are repeating the story of the previous generation. This also reminds me of those people who stick to their posts like street lamps and contribute in obscurity in life. "and the silk-worms of spring will weave until they die, and every night the candles will weep their wicks away", for example, is our teacher. They have worked tirelessly, taught us knowledge and taught us the truth of being a human being, but what can they get in return? The slogan "Go home safely and have a happy New Year" is well known, but have we ever thought that without those drivers and train attendants who stick to their posts every day for 365 days?

can we get home safely? There are so many scientists, it can be said that the great development, progress and leap of science now, how can it be achieved without those scientists who are silently dedicated below? There are also policemen who serve people, soldiers who defend Bian Jiang, and doctors who heal the wounded and rescue the dying. Without their dedication, we would have a happy life now.

I love street lamps, and I love the ordinary street lamps, but I love those unknown devotees even more, because they meet the truth of my life and spur me to work hard!