Footcandle
fccx:fc · Illuminance
1 fc = (1 lm)^1 × (1 ft²)^-1.
- Quantity kind
- Illuminance
- SI dimension
L^-2 · Jv- Allowed roles
- Scalar
- Unit system / convention
- Other conventions
- Registry code
fc
Scope and distinctions
Explicit unit scale. Luminous flux/intensity/illuminance conversion still requires geometry; activity is not equivalent dose or cyclic frequency.
Available operations
UUCE executable Preview · Use cx:fc with a compatible unit and a pinned snapshot.
No legacy converter is linked for this definition.
Verification scope
- UUCE conversion capability
units.convert@0.1.1· VERIFIED- Production binding at publication
- CURRENT
The definition lifecycle describes this registry entry. CVP status describes the conversion capability and the cases and rejection partitions in its Manifest. CVP Manifest · Public replay cases
Candidate is a registry lifecycle state. It is not a completed review or CVP verification.
Definition sources
- NIST — NIST Guide to the SI, Appendix B.8
SP 811 online conversion table accessed 2026-10-28
Appendix B.8: footcandle; 1 lm per international ft²
Source checked:Exact definition is distinguished from rounded table entries; no media copied.
Definition and registry versions
- Definition revision
- 1.0.0
- Registry snapshot
- 0.3.0-preview.3 · preview
- Definition lifecycle
- candidate
- Definition owner
- core.metrology
- Definition digest
464c8d5f894ba13417a181f9c476d1982b32d6380bccad461fce898d2a50164c- Definition dependency digest
551e315e5525a1e9cd40932dd9ca236044bacc1082f2bcc161fbcd223198350f
Digests identify definition content; they are not CVP evidence or production attestations.