Lamp rerating

Lamp rerating is modelling the predicted properties of a filament lamp when running the lamp at a voltage other than its specified rating, using a power law function of voltage. The following equations can be used to estimate the new operating point. The exact value of the exponent parameters will typically vary slightly with the particular lamp design.

Rerated current = ^0.55 × current at design voltage
Rerated luminous intensity = ^{3.4 to 3.5} × Luminous intensity at design voltage
Rerated life = ^{−12 to -16} × Life at design voltage
Rerated electrical power = ^1.6 × Electrical power at design voltage
Rerated color temperature = ^0.42 × Color temperature at design voltage

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