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
No converter is linked for this definition yet. You can inspect the definition and its sources.
Verification scope
New UUCE conversion paths have not been CVP-verified or production-attested. An exact unit definition is not a verification claim.
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.