Light bulb energy efficiency

[qijino1236]

The most energy efficient bulb.... is there anything more energy efficient than an LED light bulb...aka... more lumens per watt

http://www.designrecycleinc.com/led%20comp%20chart.html or a better type of LED that creates more than 118 lumens per watt?

[swansont]

118? Not even close to the record. http://www.cree.com/press/press_detail.asp?i=1304945651119

 

231 lm/W is around the theoretical maximum, which is a bit of a squishy target because different profiles are still considered "white"

[qijino1236]

But it looks like the best Cree has for lightbulbs is 80 lumens per watt... do you know when they will be using the 231 lumens per watt in lightbulbs?

 

Or is there another company that has a greater than 118 lumens per watt light bulb that you can actually buy?

[swansont]

But it looks like the best Cree has for lightbulbs is 80 lumens per watt... do you know when they will be using the 231 lumens per watt in lightbulbs?

 

Or is there another company that has a greater than 118 lumens per watt light bulb that you can actually buy?

 

Not sure. There's always a gap between what you can buy and what has been demonstrated in the lab, because you need robust products and manufacturing techniques that allow for reliable mass production.