Select independently determines what we cover and recommend. When you buy through our links, we may earn a commission. Learn more. When it comes to emerging skin care science, I’m a skeptic at ...

Why make red LEDs using blue die plus phosphor? More than one LED company is avoiding traditional AlInGaP die when making red and amber LEDs, and is instead using blue InGaN die plus a phosphor layer ...

For example, when red, green and blue LEDs are combined, they produce white light. Another method uses a blue LED and yellow or red phosphors. For a long time, LED bulbs were much more expensive ...