On 23/10/2017 16:31, Dave Plowman (News) wrote:
In article ,
John Rumm wrote:
The technology is different because a (non RGB) illumination LED is
typically a hybrid device, that uses a blue spectrum LED to excite a
more traditional phosphor coating to produce white light, rather than
the output from the LED being used directly. (indicators LEDs are very
narrow band - producing a discrete single colour. Its partly this that
makes them so efficient)

Which is also why just using RG&B LEDs may not produce the full spectrum
of colours.


I have a very cheap remote controlled RGB LED floodlight where the
individual colours are adjustable. The white light it produces is quite
poor. Its impossible to adjust so it doesn't have an overriding hint of
one of the primary colours.


--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk