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Why is the color temperature range of RGB lights limited? (feddit.org)

submitted 2 days ago by marius@feddit.org to c/smarthomes@feddit.uk

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For example I have some last gen hue lights 1100 lm. Their color temp goes from 2000 - 6500 K. Why is that? I mean the are RGB, they can do pure blue and pure red, so they should be able to do any temperature, no?

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[–] WolfLink@sh.itjust.works 8 points 2 days ago* (last edited 2 days ago)

The color temperature refers to black body radiation spectrums. At too low a temperature, it would just be a dim red (or eventually just invisible infrared). At too high a temperature, it’s basically just white already, it might shift to being slightly blue but not that much.

2000K - 6500K is about the limit of what black body spectrums could reasonably be converted to RGB colors.

Here’s another source talking specifically about light bulbs with some comparisons:

https://www.e-conolight.com/blog/post/warm-or-neutral-which-is-the-white-for-you