Studio T+L

Studio T+L provides Theatre Planning + Design, and Lighting Design to architects and owners.

08/18/2026

LP-30 at ArchLight Summit

I'll be at Dallas Market Center's ArchLight Summit on September 15th giving a presentation on ANSI/IES LP-30, which presents a phase-by-phase implementation of TM-30, from schematic design to construction documentation. By understanding the TM-30 information gathered at each stage of design, designers can create lighting solutions with a broader range of color rendering goals that meet specific requirements and enhance overall environments. Integrating TM-30 into design processes and specification documents ensures that the desired lighting characteristics are achieved and maintained throughout the project.

I’ll be at Dallas Market Center’s ArchLight Summit on September 15th giving a presentation on ANSI/IES LP-30, which presents a phase-by-phase implementation of TM-30, from schematic des…

08/17/2026

Color Rendering, Whiteness, and TM-30

I know I often write about color rendering. It’s because most lighting manufacturers and specifiers treat color rendering as a check box item (80 or 90?). I see color rendering as a powerful, valuable design choice that impacts the appearance of a space. This is especially true when using TM-30’s suite of measurements. So, here I go again… I recently came across an ad from a luminaire manufacturer that described three versions of a new product line that focuses on color rendering....

I know I often write about color rendering. It’s because most lighting manufacturers and specifiers treat color rendering as a check box item (80 or 90?). I see color rendering as a powerful, val…

07/27/2026

I was recently a guest on The Lighting Controls Podcast where I spoke with C. Webster Marsh and Ron Kuszmar about today's control requirements, what I'd like to see in future control systems, and (of course!) TM-30. Give it a listen.

I was recently a guest on The Lighting Controls Podcast where I spoke with C. Webster Marsh and Ron Kuszmar about today’s control requirements, what I’d like to see in future control sy…

07/13/2026

CRI Has One Job. That’s the Problem.

Below is a slightly expanded version of an article I wrote for this month's IES NYC newsletter. Color rendering should be an intentional design decision, not a specification checkbox. I was recently in what should have been a beautiful hotel bar. The interior was relatively new and skillfully conceived and executed, the materials were luxurious, and the lighting design should have been beautiful....

Below is a slightly expanded version of an article I wrote for this month’s IES NYC newsletter. Color rendering should be an intentional design decision, not a specification checkbox. I was …

06/11/2026

ArchLIGHT Summit Preview at Lightovations

On June 24th I'll be joining Webster Marsh at Lightovation as he moderates What Great Lighting Looks Like Now, a preview of seminars that will be given at September's ArchLIGHT Summit. In September I'll be giving a presentation titled LP-30: A Phase-By-Phase Approach to TM-30. Others on the Lightovation panel and at ArchLight Summit will be Craig Bernecker on…...

On June 24th I’ll be joining Webster Marsh at Lightovation as he moderates What Great Lighting Looks Like Now, a preview of seminars that will be given at September’s ArchLIGHT Summit. …

04/09/2026

A Brief History of TM-30

Next Wednesday I’ll be giving a presentation on LP-30 at LEDucation (hope to see you there!), and in preparing for it I’ve been reflecting on how far we’ve come in our understanding and evaluation of color rendering. The Color Rendering Index (CRI) was published by the International Commission on Illumination (Commission Internationale de l’Eclairage or CIE) in 1965, primarily to deal with the problem of poor color rendering by early fluorescent lamps. ...

Next Wednesday I’ll be giving a presentation on LP-30 at LEDucation (hope to see you there!), and in preparing for it I’ve been reflecting on how far we’ve come in our understanding and evaluation …

02/19/2026

TM-30 Users Guide Now Available

I'm delighted to announce that ANSI/IES LP-30 Lighting Practice: A Comprehensive Guide to Specifying Color Rendition — Concepts, Criteria, and Implementation is now available in the IES Online Lighting Library and the IES Store. For more than three years, a half dozen IES Color Committee members worked to create a clear, concise, easy to understand document. LP-30 provides the industry with a guide to specifying color rendition with TM-30 by expanding on the framework of TM-30 Annex E....

I’m delighted to announce that ANSI/IES LP-30 Lighting Practice: A Comprehensive Guide to Specifying Color Rendition — Concepts, Criteria, and Implementation is now available in the IES Onlin…

02/02/2026

Equity In Light at PS166Q

I have the great pleasure in joining other leading NYC lighting professionals in working with Equity in Lighting's enrichment program at PS166Q in Queens. The program brings an exciting, hands-on STEAM learning experience to 4th grade students through the world of lighting. Over 8 weeks it introduces students to the science, technology, engineering, art, and math (STEAM) behind lighting — a subject they encounter every day, but may never have explored as a powerful tool for creativity, innovation, and problem-solving....

I have the great pleasure in joining other leading NYC lighting professionals in working with Equity in Lighting’s enrichment program at PS166Q in Queens. The program brings an exciting, han…

12/03/2025

TM-30 and LP-30 at Lightovations

The IES is about to publish ANSI/IES LP-30 Lighting Practice: A Comprehensive Guide to Specifying Color Rendition – Concepts, Criteria, and Implementation, which is essentially a user's guide to TM-30. The IES Color Committee worked on it for over two years to create an easy to read, comprehensive, phase-by-phase guide to integrating TM-30 into a designer's work flow. On January 11th I'll be giving a…...

The IES is about to publish ANSI/IES LP-30 Lighting Practice: A Comprehensive Guide to Specifying Color Rendition – Concepts, Criteria, and Implementation, which is essentially a user’s gui…

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