The days of good old incandescent lightbulbs are over. They've been replaced with CFL, LED and other lighting technologies - click here if you aren't sure which technology is right for your next bulb purchase.
In the long run, LEDs are going to be the dominant technology. They're energy efficient, long lasting and the cost is coming down. There is a problem, though.
You won't notice it right away, but LEDs don't last as long as they should. After just six months, some models have dimmed 30%, and after seven years they're due for replacing. That's still a long time, but not as long as it could be.
Jack Dyson - son of the legendary Sir James Dyson of Dyson vacuum cleaner fame - thinks he has a solution. His new LED system could last for 40 years or more.
The key to keeping LEDs bright for decades is heat management. Dyson created a system of LEDs and heat pipes that keeps the bulbs at a steady 55 degrees.
At that temperature, the bulbs should last 37 to 40 years while running 12 hours a day - or 160,000 to 180,000 hours. It will need to as well, because the cost of the system is a bit on the expensive side.
The CSYS TASK desk light will set you back $850. A single Ariel hanging light will go for $2,100. Even at 40 years of use, you're looking at paying $21 and $52 a year, respectively.
Of course, for a desk light, you might only use it six hours at night, in which case it could last 60 years. That brings the cost-per-year down to something reasonable, but seeing the savings is going to be tough.
That's why Dyson is targeting long-term businesses and buildings - like airports - first. Those have a lot more lightbulb turnover, so it would make more financial sense.
As more businesses adopt these systems, costs should come down. Homes and apartments of the future might have them built in from the beginning. You can move in, stay for a year or even a decade and never have to worry about changing them.
Plus, the more expensive Ariel includes Wi-Fi so you can control when it's on and the brightness with an app. It also records how much energy it's using so you know what you're saving.
What do you think? Would you buy one of these lights? Let me know in the comments.