White LED bulbs are commonplace in households ... YouTube with a Philips MR16 LED spot that had developed a distinct purple light output. The crumbling phosphor coating on top of the now exposed ...

These diodes can emit light at a variety of wavelengths—but one color they do not produce naturally is white. So when you ... turned a jarring shade of purple. It is hard to determine the ...

The combination of the yellow phosphor coating and purple or blue light below results in a white shine. (Chris Langenzarde/CBC) The City of Vancouver is working to replace all 55,000 of its ...

some LED streetlights in FPL’s service area are emitting a violet or purple hue rather than the standard white light because of a manufacturer defect. As certain LED lights age, there is a ...

In other words, the intended white light comes from a combination of the technology within the fixture and its surface coating. When that coating is defective, a purple hue can result. Similar ...

It’s coated with a layer of yellow phosphor, so it emits a white light. But in the faulty lights, that coating of yellow phosphor is wearing off, causing the purple bluish hue. Experts believe a ...