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LED Transformer Load Calculator

Check LED load against driver or transformer rating with headroom.

Check driver type, dimming compatibility, voltage/current mode and manufacturer instructions.

Notes and next steps

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How it works

Check LED load against a transformer or driver rating with headroom.

Estimating method: Required rating = LED load × (1 + headroom percentage ÷ 100).

Worked example

80 W of LED load with 20% headroom needs a driver rated at least 96 W.

Common mistakes
  • Running drivers at their limit.
  • Mixing constant-current and constant-voltage drivers.
  • Ignoring inrush, dimming and manufacturer limits.
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