Cadiant™ Vlog Episode 4: TM-30

Updated : Sep 12, 2019 in Articles

Cadiant™ Vlog Episode 4: TM-30


Hello again, I’m Jeff Hungarter with Cree
Lighting here in Durham North Carolina. In the fourth episode of The Art and
Science of Bringing the Outdoors In, I’m here with Katherine Casper,
vice-president of indoor products. Welcome, Katherine. Hi, Jeff, thanks for
having me. Today what we talk about is TM-30, the always colorful
topic of TM-30. You can see obviously where we’re prepared for that
can you tell us a little about TM-30? TM-30 is a method of evaluating how colors are rendered within a light
source. Excellent isn’t that what CRI does? True,
CRI has been around for decades we’ve been using it for a long time but there
are some key differences. One of course is CRI measures color versus 8
reference samples versus TM-30 uses 99 so that’s one part of it and so and
that’s where you’re looking at the fidelity which is how close you are to
that reference source within that. TM-30 also uses other pieces of
information so it’s also looking at discrimination, and preference, and all
those different pieces. Okay, so what would be you know they have CRI fidelity,
and you have TM-30 fidelity, so can you just maybe sum up what is like what is
that major difference I guess? Well it does go back to eight samples versus 99
okay and those eight samples in the CRI are mainly more in pastel hues versus
hitting all of the colors in a spectrum. Or, not all, but 99! Gotcha… it’s a lot more!
What are some of the other parameters that TM-30
can measure with that other than the ones that you were just kind of
mentioning there? So another key metric in TM-30 is the gamut value. It’s the saturation of color or how intense or
rich a color is or is portrayed underneath the light source. Which
becomes very important when you think about designing
spaces for specific applications. So think about a retail store: if they’re
selling large red apples you’re probably going to want your light source to hit
more towards the red versus John Deere tractors or you’re gonna go more towards
your greens and you don’t want to wash those things out. So having that level of
information makes a huge difference. Excellent! I’ve also heard this thing
about this color vector or something. Could you tell us a little bit more about
that? It’s really cool this color vector graphic. And so as we all know picture’s
worth a thousand words right? So it is a graphic that literally shows where
the light source color sits within all those hues. It gives you that great
visual way of looking at where your lights going to be and where it’s
sitting within their spectrum. Okay, that sounds it sounds like a great
measurement tool. Using this gamut and this vector
graphic and 99 colors versus the eight; How does that – in terms of
designing for spaces – how do you think people will start using that to
help design spaces? Well, the lighting industry is really shifting towards
designing spaces for the people that are within them, the work that’s being done,
be that classroom, or an office, or a retail space, and really this is just a
great tool to optimize your light for the application. So that’s where TM-30 is
going to be a great way to help designers, specifiers, and manufacturers really
understand how to hit those specific light sources, and applications, and color.
This comes from the IES right? Yes, the Illuminating Engineering Society (IES)
has been working hard on this. They have committees, and tests, and really a lot of
work has went behind this, and really kind of – and from all different sides –
that’s buying designers, that’s engineers, and that’s even manufacturers.
How that you can actually achieve the better color. So, it sounds like a lot of
good things coming out of this. So with Cree Lighting, how do you see Cree Lighting utilizing some of this to, you know, in the
fixtures, and some of the designs, that people might use? Well, Cree Lighting has
always been known for superior color and so this fits right in. Utilizing this
data for superior light quality, color, all of those different aspects, and
that’s truly shown in our new Cadiant experience. This is a luminaire that’s
different than anything you’ve ever seen! We have a fidelity of
greater than 90; now remember that was a 0 to 100 scale, so that sounds very good!
The gamut is a hundred across all color spectrums and
so if you remember that fixture it goes through the course of the day so you’re
hitting a wide range of color temperatures within that, and you’re
still hitting that hundred. The other thing that’s really cool about TM-30, and the Cadiant luminaire, is ‘Rf,skin’ which is [a rating system for] how your skin appears underneath the
light source. Lots of cool things to come, and so it’s a fun tool, and
it’s really cool to be able to use that in lighting design. I Imagine
especially for places, like maybe healthcare applications, or you know,
where that ‘Rf,skin’ measurement could be really instrumental and how your design.
And what kind of fixtures you might choose. It can be critical. But it’s a fun
tool to use! Great… anything else you want to share on TM-30? I think we’ve hit
the main points. There’s so much information out there, but those are the
main three keys to hit, and so I think I think we’ve covered it. Great, well thanks
again for joining us on The Art and Science of Bringing the Outdoors In, and
we’ll see you next time! Thanks.

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