My friend's dad bought one of those sold on TV - Bell and Howell garage ceiling lights.
He was so pleased with it he bought one for his daughter and son in law.
Within a couple of months, it failed to light.
Within a couple of months later, his daughter's one failed to light.
In my experience, garage LED lighting seems to have a higher rate of failure due to constant vibration.
So it is very possible the vibration could be a factor in prematurely short lifespan. In other words, it simply was not really designed the best.
The same is true for incandescent and halogen bulbs, particularly the "higher efficiency" ones that put out brighter whiter light closer to 2900-3000K, but it doesn't seem to effect the "rough service" incandescent bulbs that put out more orange-colored light.
The other factor is that the majority of Chinese products have a reputation to be designed as cheap as possible, and the factory's only concern is to make products that will function for several days after purchase. After that they don't care. The factory only has a need for the buyer not to be able to claim that the seller scammed them or sold them a defective product. But if the product works for a few days after opening the box and then breaks, it becomes much harder for the buyer to complain. Sometimes the products are simply designed to only last 6 months or a year, but then as a consequence of that, a small percentage of the product ends up failing much sooner than that, after only days of use. Chinese electronic manufacturers will cut as many corners as possible to reduce costs and price, trying to compete. They also have lower and different ethical standards than what people are accustomed to from a business in America or Europe.
Part of this is economics. Maybe 60% of the consumers would not have decided to buy that particular product if the cost had been 45 dollars rather than 30 dollars.
And if you have fewer consumers, it also hurts scale of production and increases per unit production and sale costs. So then you end up having to increase price even more, which results in loss of more consumers.
People are less likely to make an impulse buy for something they don't really need when the price is higher.
