On Tue, 25 Apr 2017 21:14:46 +0100, Rod Speed wrote:

James Wilkinson Sword wrote
Rod Speed wrote
James Wilkinson Sword wrote

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

Varys with who is doing the bulbs. The cheapest ****
does it differently to the stuff with the long warrantys.

Don't they all use something similar to CREE LEDs?

Nope, the cheapest **** has the individual leds clearly visible.

What do you mean by that? You can always se individual LEDs can't you?

The fancy **** does indeed have what CREE calls remote phosphors.

But those don't work where you want a bulb that you
can vary the color temperature to anything you like.

--
What's the fastest thing in Wales?
A virgin sheep.