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Energy-saving lamps are fluorescent lamps. Fluorescent […]
Energy-saving lamps are fluorescent lamps.
Fluorescent light emits electrons that bombard mercury (gaseous) atoms, causing the mercury atoms to emit ultraviolet light. Some of the ultraviolet light excites the phosphors coated on the walls of the tubes, and the phosphors emit the light we need.
When manufacturing lamps, liquid mercury, or "solid mercury" (a combination of metals such as mercury and indium tin) is added to the lamp; these mercury are partially affected by temperature and become gaseous mercury.
When the temperature is low, just turn on the light, the gaseous mercury in the lamp is less, and the chance of electron bombardment to them is less; as the lighting time increases, the temperature of the lamp rises, the gaseous mercury in the lamp increases, and the electron bombardment increases their chance, the light It’s brighter.
If it is a hot summer, the phenomenon you say will not appear. The light will reach its brightness within 1 minute.
In addition, the higher the temperature of the lamp is, the brighter the lamp is. The optimum temperature is about 28 degrees at room temperature. The temperature of the "cold end" of the lamp (the lowest temperature on the lamp) is about 50 degrees, and the lamp is the brightest.