Comment by periblepsis on Could someone point me to a textbook or theory behind the workings of LED driver circuits with automatic voltage regulation

I was looking at some of my own early LED lamps and some recently purchased ones. The older circuits are more sophisticated. And today they overdrive them as, I believe, they pretty much want them to be cheap, bright when cheap, and to fail sooner. However, it appears that Dubai made a special deal with Philips. Those we often find when not in Dubai may be made to last longer when modified.