You're listening to Nocturne, I'm Venice alone.

Light has different colors. It can either be really cool, so 5,000K light is really cool.

Or it can be really warm, like 2,700 and now the industry is going down to 2,200K.

I'm not sure if you want me to explain color temperature.

That's Jane Slade. She's a lighting designer and researcher.

But the way that it works is that it's correlated color temperature.

So if you think of a carbon-based black body, like a log, in a fire,

well, the embers at the bottom of the fire are that bright orange.

Well, that's always the same temperature.

So that's about 1,000 degrees Kelvin.

And then the white flame coming off the log is about 2,700 degrees Kelvin.

And then the bluest flame, which was the hottest, is 5,000 degrees Kelvin.

So when we talk about light color in the lighting industry,

it's really correlated light color to that black body because it's constant.

So 5,000K light was the initial color choice for all original LED installations

because it's the most efficient.

2,700 is less efficient. You'll get less lumens per watt.

So when the industry was converting to LEDs, we initially chose very blue light,

which, as it turned out, is deeply impactful to all living things.

So we've started to come down in color temperature from say 5,000 to 3,500 to 3,000.

And now we're really starting to see that people are starting to install 2,700 and now 2,200

with that beautiful warm glow.

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