What is CRI and TLCI? Demystifying Lighting Metrics with the Sekonic C-800: Part 1

Have you ever wondered, "What is CRI?" What about TLCI?? In todays video, we dive deep into the world of lighting metrics using the remarkable Sekonic C-800 spectrometer.

Get ready to uncover how a spectrometer works, the CRI definition, along with insights into spectrum distribution, TLCI and more. We've provided practical examples to simplify each metric for you. By the end of this video you'll feel confident making informed decisions when selecting lighting fixtures for your projects.

Explore how the C800 spectrometer functions and understand why it's revolutionizing the way cinematographers and gaffers evaluate lighting. Plus, gain exclusive access to real-world comparisons between various light sources, from tungsten to LED to sodium vapor street lamps.

Part one of this series focuses on spectrum distribution, CRI, and TLCI, with part two covering TM-30, SSI, and more! So don't miss out!

A huge shoutout to Sekonic and Kayell for providing us with the C-800 and enabling this educational series.

Let's illuminate the world of lighting metrics together!
#LightingMetrics #CRI #TLCI #Sekonic #C-800

NOTE:
I made a mistake in the video and incorrectly labelled TLMF. It stands for "Television Luminaire Matching Factor", not "Television Lighting Matching Factor" as stated in the video.
I also wanted to note that the CRI scores are calculated using R1-R8 only and do not factor in R9-15 in the Ra value.
You may notice some slight variations between the live recordings and the measurements from the screen capture images, which were collected separately at a later time. These minor variations are normal and within an acceptable margin.

Gear Mentioned:

▶︎▶︎ Sekonic C-800 on Amazon (affiliated): https://amzn.to/3xthwG9
▶︎▶︎ Calibrite (formerly X-Rite) Color Checker Classic Chart on Amazon (affiliated): https://amzn.to/3PLBD8W
▶︎▶︎ Amaran 200x S on Amazon (affiliated): https://amzn.to/3U13GUi


CONTENT:
00:00 - Introduction to Lighting Metrics
00:57 - Introduction to the Sekonic C-800
01:22 - How Does a Spectrometer Work?
03:16 - The Setup
03:57 - Spectrum Distribution
04:46 - Spectrum of a Tungsten Dedolight
05:29 - Spectrum Comparison Mode - Dedo vs Amaran
06:55 - Spectral Comparison of a Sodium Vapor Street Lamp
08:18 - What is CRI?
08:38 - CRI Explained
11:18 - CRI Comparison Mode
12:06 - TLCI Explained
13:26 - TLMF Explained
14:42 - Outro

Make sure to checkout our other videos on film lighting basics in our film lighting techniques and filmmaking tutorials playlists!

Film Lighting Techniques Playlist:
   • Film Lighting Techniques  

Filmmaking Tutorials Playlist:
   • Filmmaking Tutorials  

Gear Reviews Playlist:
   • Gear Reviews  

💡 Our Lighting Kit:

Amazon US Product Links (affiliated):
Aputure Amran 100D: https://amzn.to/3mj1Eha
Aputure Amran 200D: https://amzn.to/3yLqoUg
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Nanlite Forza 60B: https://amzn.to/3xoRMam
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Nanlite FL-11 Fresnel Lens for Foza 60 Series: https://amzn.to/3NKCfZr

Lee Master Location Gel Pack: https://amzn.to/3e2jYtY

Avenger 40” C-Stand (standard): https://amzn.to/30MTBBR
Avenger 40” C-Stand (detachable leg): https://amzn.to/3sofra0

Matthews 40” C-Stand (sliding leg): https://amzn.to/3eslvq5
Matthews 20” C-Stand (sliding leg): https://amzn.to/3mmPaF8

Impact Heavy-Duty Air-Cushioned Light Stand (8’): https://amzn.to/3stAHeN
Impact Heavy-Duty Air-Cushioned Light Stand (9.5’): https://amzn.to/3FjvIAH
Impact Heavy-Duty Air-Cushioned Light Stand (13’): https://amzn.to/33N3AYZ
Kupo Folding Base Mini Stand: https://amzn.to/3H45m5V
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