Disadvantages and advantages
Today, an ordinary incandescent lamp is used everywhere around the world. The main criterion why people prefer this lamp is its low price. It costs an average of 10 times cheaper than an energy -saving lamp. Of the shortcomings, its rapid heating and fragility should be noted. The average service life of a tungsten lamp is 1200-1400 hours of work. In addition, she is fire hazard.
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