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Directional fixture

What replacement bulb does a track light need?

Reviewed August 28, 2026
Answer

Match the lamp base and voltage first, then reflector diameter, neck length, beam angle, lumens and dimmer compatibility.

Ceiling track lights aimed at framed artwork and a table
Match the base and voltage before using beam angle to shape where the light lands.

Bases you may encounter

These are common possibilities, not a substitute for the model documentation.

GU10 PAR16Open guide →GU5.3 MR16Open guide →E26 PAR20/PAR30Open guide →Integrated LED head

What to read on the old lamp and fixture

  1. Remove one cooled lamp and inspect its pins.
  2. Read voltage on the lamp and track head.
  3. Measure reflector diameter and available depth.
  4. Choose beam angle for the intended target.