Practice question

What is 'inrush current' in LED roadway lighting systems and why is it important?

  1. The normal operating current of the luminaire
  2. The momentary high current drawn when LED drivers first energize, which can be 10-100 times the steady-state current and may trip circuit breakers
  3. The current during dimming
  4. The ground fault current

Answer: B — The momentary high current drawn when LED drivers first energize, which can be 10-100 times the steady-state current and may trip circuit breakers

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