What do TLCI, SSI, CRI and TM-30 measure, and what are their documented limits for choosing lights for camera work?

Partially verified: the curator re-read S41; S42 was not re-read by the curator and rests on the producer's pinned reading. TLCI-2012 scores a light through a simulated TV camera and display against a reference at the same CCT; its Qa scale is calibrated so a daylight fluorescent tube scores 50, which EBU treats as the watershed between luminaires colourists can and cannot correct acceptably; EBU says CRI was never intended for television. Curator qualifications: Partially verified: the curator re-read S41; S42 was not re-read by the curator and rests on the producer's pinned reading. Curator GET 2026-10-23 of the sources not re-read (mechanical source evidence, not semantic verification): S42: HTTP 200, bytes equal to the producer pin. Documents/code read 2026-10-22; no lights measured or CDLs applied. Academy SSI overview (S42) returned 403 to curator: SSI scope (SPD-only, 375-675 nm, ST 2122) and the Academy single-chip-sensor caveat are from producer reading only. Limitations: Documents/code read 2026-10-22; no lights measured or CDLs applied. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://tech.ebu.ch/docs/tech/tech3355.pdf",
      "note": "EBU Tech 3355 (March 2017), Introduction and section 1.5"
    },
    {
      "url": "https://web.archive.org/web/2023/https://www.oscars.org/sites/oscars/files/ssi_overview_2020-09-16.pdf",
      "note": "EBU Tech 3355 (March 2017), Introduction and section 1.5"
    }
  ]
}