Probably because even LEDs have become a low margin business. I've a bunch of the Chinese brand LED bulbs from Amazon and they last for years and there is so mu

Probably because even LEDs have become a low margin business. I've a bunch of the Chinese brand LED bulbs from Amazon and they last for years and there is so much variety. In terms of LED bulb longevity, I think a big part is heat dissipation so the heatsink size and fixture design are critical.