Yes that is true, but once again its because the bandwidth of an led is
quite narrow.
I feel this thread is a bit of a slight troll here as I think this very
topic was discussed here not very many months ago, as regards lighting that
could be set to different tints.
Brian

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The Sofa of Brian Gaff...

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"Graham." wrote in message
...
On Tue, 25 Apr 2017 12:25:35 +0100, "James Wilkinson Sword"
wrote:

Yes, I've googled it, but there are many different approaches. Which one
is used in domestic LED bulbs?

Ultra-violet LED exciting a white phosphor, much the same principle
used in florescents.

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Graham.
%Profound_observation%