I keep seeing all kinds of objects now having small but very bright LED lights in them, seemingly never burning out, requiring almost no batteries/power, and extremely durable.
I remember being a child in the 1990s and the typical flashlights you could buy were extremely crude in comparison: huge, bulky, metallic, heavy, requiring many large batteries, and requiring the light bulb in it to be replaced. And it barely made much light.
Now, they seem to be able to put a bright LED into any small object which shines way more.
How did that happen? The technology "LED lights" must have existed for many decades prior to the 1990s, even. So why is everything just recently using them?