An article I found in IEEE Spectrum very relevant very informative worth reading fascinating and deeply researched article focusing on the major problem with the high brightness LEDs talking about Droop Effect in white and blue LED. Which is the unfortunate tendency of the LED to dim over time. Even if you know how LED works from device physics level specially the blue and the white once, think again this article explains technically and very readable terms, what goes on the complexity of the led and the style of the fabrication. The researches here have been very focused and tactical in learning the position, energy and quantum stages of various particle in these LEDs and the particles are not standing still nor they stage in position for long, so researches are trying to find using some incredibly sophisticated instrumentation to try to get to know what is going on.
