How a Philips light bulb uses blue LEDs to produce white light
extremetech.com
extremetech.com
http://webcache.googleusercontent.com/search?q=cache:wMnxadU...
evo_9 is another weird account that does a lot of extremetech although he really looks like he's on Ars Technica's payroll more than theirs:
http://news.ycombinator.com/submitted?id=evo_9
They also have at least one employee submitting:
Reads more like an advert for the Philips bulb, too.
See http://www.marco.org/2012/07/31/two-new-led-bulbs (and the earlier review, which included this Philips bulb) for some views and pictures of the differences in the colors.
I care far more whether the output color of the bulb is close to incandescent lighting or maybe to sunlight (what folks are used to), and preferably better or closer than the alternatives.
That the bulb does not produce some weird color shade.
That the bulb is not too dim to be useful.
That the bulb is lacking in other problems such as the classic fluorescent flickering, too.
And that the payback for this bulb over the alternatives is sufficiently short for my budget.
The use of a blue LED is at the bottom of that list.
If Philips came up with a way to do that with a phosphor-shifted blue LED bulb (and probably because they can't find or couldn't find an affordable incandescent-colored LED), well, good on them.
And in the event I was interested in what Philips did here for this bulb, I can look at their advertising brochures for this bulb, and (having read the Philips materials) which are better done than that Extremetech article.