Highest lumen per watt led chip?

[Derry]

I know in 2014 cree broke the record with 303 lumens per watt, im not sure if it's been broken again, but im wondering if someone knows where these chips can be accessed? Most cob builds ive seen get around 125 lumens per watt, and I would like to see what better chips could do

 

[Passel]

Which Cree chip?

Currently one in production I know of is Vero 29 Gen 7, 210lm/w driven at low current.

 

[frica]

CXB3590 is 160+ lm/w at 50 watt.
CLU48 1818 too.
Vero 29 gen 7 is higher.

The Cree XP-G3 high power LED is also very efficient.
Running it at 1 watt will always get it to 160 lm/w+ (even at extremely high temps) (S5 bin)

 

[CobKits]

Which Cree chip?

Currently one in production I know of is Vero 29 Gen 7, 210lm/w driven at low current.

not sure how accurate those online calculators are. you can get it to give you over 350 lm/W at low currents

to answer the question, id say at 5-10W theyre all about the same and a cheap chip like a 1212 gets you there easier

most cobs seem to top out around 190-200 lm/W

seems like the discrete chips like seen on the quantum boards will get you to 220 lm/W. dissipation prob the limiting factor

 

[Derry]

Interesting, so around 50 watts most cobs sit around 150-200 lumens per watt or so?

 

[Passel]

Yes. For example, have a look at Vero Gen 7, starting from page 3, last column:
http://www.bridgelux.com/sites/default/files/resource_media/Bridgelux DS93 Vero 29 Gen 7 Array Data Sheet 20161205 Rev G.pdf

Most efficient there is on page 10, 210 Lm/w driven at 855mA.

 

[Passel]

not sure how accurate those online calculators are. you can get it to give you over 350 lm/W at low currents

Which chips gives 350 lm/w ?