Multiple choice general knowledge sports

Which of the following lightbulb types uses the least energy, and therefor results in fewer greehouse gas emissions?

  1. Incandescent

  2. Compact fluorescent

  3. Halogen

  4. Sodium Vapour Lamp
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Among common residential bulb types, Compact Fluorescent (CFL) bulbs use significantly less energy than incandescent or halogen bulbs, producing fewer greenhouse gas emissions. LED bulbs would actually be most efficient, but weren't listed as options. CFL was the standard efficient choice before LEDs became mainstream.

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