Multiple choice general knowledge science & technology

Which among the following is most energy efficient?

  1. Incandescent bulb

  2. Fluorescent tube light

  3. Compact fluorescent lamp

  4. Serial Bulbs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Compact fluorescent lamps (CFLs) are the most energy-efficient option listed, using approximately 75% less energy than incandescent bulbs and lasting longer. Fluorescent tube lights are also efficient but less so than CFLs. Incandescent bulbs are the least efficient, converting most energy to heat rather than light. 'Serial Bulbs' appears to be a distractor.

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