| |||

## Illuminance | ||
---|---|---|

## Characteristic | ## footcandle | ## Notes | ||
---|---|---|---|---|

## Symbol | fc | |||

## Other Name | ft-C | |||

## Metric (SI) Equivalent | This equivalent and the others below are calculated from exact values. | |||

## Other Metric (SI) Equivalents with More Basic Units | ||||

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity | ||||

## Metric (SI) Dimensions | length-2 × luminous-intensity × solid-angle | Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity. | ||

## Description in Terms of Other Units and Constants |

## Characteristic | ## lux | ## Notes | ||
---|---|---|---|---|

## Symbol | lx |
|||

## Metric (SI) Equivalent | lux is a metric unit (in fact, it is a derived SI unit) | |||

## Other Metric (SI) Equivalents with More Basic Units | ||||

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity | ||||

## Metric (SI) Dimensions |
length-2 × luminous-intensity × solid-angle | Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity. |

## Characteristic | ## nox | ## Notes | ||
---|---|---|---|---|

## Metric (SI) Equivalent | This equivalent and the others below are exact. | |||

## Other Metric (SI) Equivalents with More Basic Units | ||||

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity | ||||

## Metric (SI) Dimensions | length-2 × luminous-intensity × solid-angle | Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity. |

## Characteristic | ## phot | ## Notes | ||
---|---|---|---|---|

## Symbol | ph | |||

## Metric (SI) Equivalent | 10000 luxes | This equivalent and the others below are exact. | ||

## Other Metric (SI) Equivalents with More Basic Units | ||||

| ||||

## Metric (SI) Dimensions | length-2 × luminous-intensity × solid-angle | |