UPSC Prelims 2006·GS1·science-and-technology·science and technology

Which one of the following is printed on a commonly used fluorescent tube light?

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Last updated 23 May 2026, 3:31 pm IST
  1. A220 k
  2. B273 k
  3. C6500 kCorrect
  4. D9000 k

Explanation

The number printed on a fluorescent tube light refers to the correlated color temperature of the light emitted, measured in Kelvins. A value of 6500 K represents daylight or cool white light, which is the standard for commonly used fluorescent tubes in homes and offices. Options A and B are too low, representing extremely warm or freezing temperatures, while 9000 K would be too blue for standard indoor use. Therefore, 6500 K is the most common specification found on these lights.
science-and-technology: Which one of the following is printed on a commonly used fluorescent tube light?

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