When is Lumileds going to package another 2x2 emitter?

[FirstDsent]

Four of the Rebel dice in a single package like the Luxeon V would be sweet! Can we hope?

Bernie

 

[yellow]

I hope them to be wired in series (much easier to find a suiting circuit then)
and maybe just three inside the package also (then 2 Li-Ions or 4 of them can be used)
but they might use 4 because of better used space, so only the version 2 (or 3) Li-Ions and Shark remain.

or maybe these Osram guys offer one of their crazy 6-emitter-plates-inside-parts, they have been to expensive and imho to much heat producing by now that I tried them, but with the new, cooler emitters ...
these should work with a 4-cell Li-Ion and a shark

 

[jtr1962]

Lumileds used 4 dice in the Luxeon V to solve 2 problems:

1) They wanted to get 120 lumens from a single LED. Given the efficiency of white LEDs at the time this required four or five watts.
2) The dice of the time were not able to handle being driven at much more than 1 watt, so they needed four of them.

Both problems have long since been solved. All modern LEDs like the Cree XR-E, Seoul P4, and Rebel can be driven at power levels of 3 or 4 watts. Furthermore, they are much more efficient, and so are capable of emitting upwards of 225 lumens at maximum rated current. Since the problems the Luxeon V was created to solve no longer exist, there is no good reason to have a 4-die LED.

Note that the white Luxeon V had severe lifetime issues due to the inability to totally match Vf among the dice. It was/is also much higher in price due to the extra manufacturing steps. At best the Luxeon V was simply a stopgap measure. Technology has marched on. There is no need for mounting multiple dice in a single package any more. Even if there were, a series arrangement rather than a series-parallel arrangement would create the fewest problems.

 

[FirstDsent]

Lumileds used 4 dice in the Luxeon V to solve 2 problems:

1) They wanted to get 120 lumens from a single LED. Given the efficiency of white LEDs at the time this required four or five watts.
2) The dice of the time were not able to handle being driven at much more than 1 watt, so they needed four of them.

Both problems have long since been solved. All modern LEDs like the Cree XR-E, Seoul P4, and Rebel can be driven at power levels of 3 or 4 watts. Furthermore, they are much more efficient, and so are capable of emitting upwards of 225 lumens at maximum rated current. Since the problems the Luxeon V was created to solve no longer exist, there is no good reason to have a 4-die LED.

Note that the white Luxeon V had severe lifetime issues due to the inability to totally match Vf among the dice. It was/is also much higher in price due to the extra manufacturing steps. At best the Luxeon V was simply a stopgap measure. Technology has marched on. There is no need for mounting multiple dice in a single package any more. Even if there were, a series arrangement rather than a series-parallel arrangement would create the fewest problems.

Yeah, I agree but nobody packages a single LED with the kind of output that you could get with 4 x 200 lumen dice in one package. Consider that all standard Luxeon optics would work with such an emitter, and the Vf wouldn't be substantially higher if at all than the current Lux Vs (would it?). Then you can have up to 800 lumens in a standard flashlight.

Bernie

 

[Kiessling]

I'd be all in for this, too. The beam shape of the LuxV lighs is quite useful, and the raw output of such a thing is not that shabby either

 

[LukeA]

A LuxV with Rebel dies would be on the order of 425 lumens.

 

[wasBlinded]

At a given power input, a good LuxV was more efficient than a good LuxIII driven at the same power - according to some tests by a CPF member (don't remember who).

And I don't know anyone who has complained about their LuxV dimming out from typical flashlight use.

I would bet that with Lumiled's "antidroop" technology, which we haven't yet seen in any of their products, a LuxV die would be a great performer with high efficiency and long life at typical use and illumination levels, and with very impressive output at high currents for those times when you just need all you can get.

 

[FirstDsent]

So how do we get this done? (he says naively)

Bernie

 

[Lightingguy321]

From what I have read about lumiramic and TFFC technology, Lumileds is in the process of revamping all of the LED lines to use the new technologies (this includes lux I, III, V, K2, and rebel) and that means the Lux I will be putting out 115 lumens at least if not more.