Last month, I wrote about CFLs and LED light bulbs, and today, I found a great video from Economist magazine, which not only talks about a new technology called quantum dots, but also does a great job of explaining the differences between incandescents, CFLs and LEDs when it comes to the light spectrum and lumens they emit.

It turns out a company in Massachusetts called QD Vision is among a handful of companies that are developing quantum dot filters for LED bulbs. These filters improve the spectrum emitted by LEDs to make the light less harsh, warmer, and closer to the spectrum of incandescent light bulbs, which ultimately makes it more pleasing to the eye. Personally, I think their filters make the light slightly redder than it needs to be, but still, it’s a step in the right direction.