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Which colour temperature range does a halogen headlamp typically produce?

  • A.Around 6000 kelvin, which is the figure characteristic of a discharge lamp and appears distinctly blue white
  • B.Around 2000 kelvin
  • C.Around 4300 kelvin, which is the figure produced by a standard discharge lamp and is close to daylight in appearance
  • D.Around 3200 kelvin

Answer: D

Halogen lamps sit around 3200 kelvin and appear yellow beside a discharge lamp at 4300. The 4300 figure genuinely describes a standard discharge lamp, which makes the last option a correct value for the other technology. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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