I'm surprised that there is no mention in the article of "filament led" bulbs (and very little mention in the comments): https://www.greenbuildingadvisor.com/ar

I'm surprised that there is no mention in the article of "filament led" bulbs (and very little mention in the comments): https://www.greenbuildingadvisor.com/article/led-filament-bulbs https://www.greenbuildingadvisor.com/article/led-filament-bu.... They are based on the simple idea of stacking enough small LED's that they can run on mains voltage. You still need a rectifier to go from AC to DC, and a capacitor for smoothing, but no voltage conversion means there are fewer parts to fail. And multiple smaller LED's makes the heat dissipation much easier, so they tend to run cool. I've been using them for a couple years, and think they are so much better than the previous generations of CFL's and heat sink LED's that would quickly fail, especially in enclosed fixtures. I'm buying cheap ones from Amazon, and occasionally I get early failures, but lifespan after initial burn in has been excellent. Like others, I often wonder why they haven't taken over the market: http://www.eevblog.com/forum/chat/why-haven_t-filament-led-bulbs-taken-over-the-market/ http://www.eevblog.com/forum/chat/why-haven_t-filament-led-b...