Adding more LEDs to the design allows them to be underdriven, increasing efficiency and longevity. The driver board and LEDs run cooler that way. Less heat equals less stress on electrolytic capacitors, a common failure point.

There’s only a few bulbs I’m aware of that follow this pattern. The Philips Dubai Lamp takes this to an extreme. A 60W equivalent uses only 3W. Other 60W eq. LEDs tend to be ~3x that. All that heat has to go somewhere.

I just picked up a 40W eq. bulb from IKEA that has double the normal amount of LED strands- they’re unusually long, too. It also uses about half the power of the LED bulb it replaced. I expect it to last quite a long time.