On 22/10/2017 15:14, Iggy wrote:

replying to tabbypurr, Iggy wrote: Says you. But, an "Indicator LED"
is all the early bulbs were a collection of and the claims were
there.

Indicator LEDs have never been much use for general purpose lighting.

"Magically", they steadily decreased to exactly where the
manufacturers needed them for constant profits. An LED is an LED and
they don't go bad in such a short period,

It would be nice if that were true, however you are dealing with
different technology, different topology, and vastly different power
levels.

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)

Indicator LEDs are point light sources that tend to be very directional.
Not desirable qualities for general purpose lighting.

Indicator LEDs have a very good life because they are run very gently
compared to illumination LEDs. So they generate little heat. Heat is a
major enemy for LED life span.

All of these have been very significant technical challenges to overcome
in the quest for a practical white light source from LEDs.

but the A-holes of the
world make sure the electronics do.

Perhaps you should show us your PSU design that is rock solid reliable
for 20k hours+


--
Cheers,

John.

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