New Luxeon Altilon

[evilc66]

http://www.philipslumileds.com/newsandevents/releases/PR121.pdf

Not all that useful for the flashlight crowd, but I'm sure someone will find a use for it outside of headlight use.

Product page

http://www.philipslumileds.com/products/luxeon-altilon

 

[bshanahan14rulz]

Neat find! Always wondered what company got to make the R8 quad-die. Always guessed osram, but wow, PL!

 

[JohnR66]

Indeed, a good product for automotive lighting. Hopefully LEDs will make their headlight debut in average priced vehicles.

If my math is correct, using average forward voltage, these won't be much interest to the high efficiency LED crowd as 44 to 60 lumens per watt is uninteresting.

Perhaps the extra heat these things make will be put to use to clear ice off the lenses in cold weather.

 

[jtr1962]

Perhaps the extra heat these things make will be put to use to clear ice off the lenses in cold weather.

That shouldn't be a problem as the light energy itself should be sufficient to melt the ice. In some of my experiments cooling power LEDs the lens only iced up at lower currents. For example, I recently had a K2 running at 1.5 amps with the heat sink at 9.5°F. The lens didn't ice up at all, despite the humid conditions in the room, due to the light energy keeping the dome above the dewpoint.

 

[bshanahan14rulz]

linear arrays might not be too fun to focus in a flashlight either. gave me an interesting idea, though

 

[space]

The efficacy isn't that bad if one consider 60 lm/w is at 1A/mm2 and the led does not have a, for high efficacies, very important light ekstracting silicone dome. Also the Vf, at 3.45V@1A is close to "normal".


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[Jumi]

And that 62lumens/watt was the minimum value of that 850bin.

Now I want to see what kind of optics and reflectors are for this and does companies like Hella start using these in aftermarket high beams, fog lights and DLRs.

I want one to use DD or slightly resistored in my sled in existing lowbeams.

Juha

 

[bshanahan14rulz]

most LED lighting optics remind me of the top half of an automotive projector. LEDs are aimed upwards at the top of the bowl which reflect the light forward and down. a ledge keeps light from straying too far down (up, after it passes through the asphere).

kind of curious if the ledge is reflective or absorbant to light, and if it would have a positive or negative affect on the output...

 

[rushnrockt]

Now I want to see what kind of optics and reflectors are for this and does companies like Hella start using these in aftermarket high beams, fog lights and DLRs.

If you look at Audi R8 design, they use double optic, first for each LED setup and then for the combined light beam for proper cut-off. More intricate than that of course, but that's the basics.

 

[mds82]

only 850 lumen??

HID lights are 3200 lumen. this is not going to be very bright

 

[Illum]

lets see if some crazy modder feels compelled to stuff this is a flashlight...

 

[lolzertank]

Even with a dome, 60 lm/W is not bad at 1A/mm^2. This might be of interest to people building super throwers. Efficiency at Cree's Q4 levels while having a very small apparent die size.

only 850 lumen??

HID lights are 3200 lumen. this is not going to be very bright

Compare to halogen high beams and you'll feel better.

 

[space]

And who says one can only implement one LED in a lamp.

Car HID's are usually ~35/50W.

 

[bshanahan14rulz]

car HIDs are between 32 and 38W.

and the optimist would say that these get 73 lm/W (and thats just assuming that the P bin isn't available. If the P bin were real, that would be between 1000 and 1200 lumens and between 73 and 87 lm/W)

And I don't think a dome would be beneficial for this LED's application. It would actually be detrimental to its ends as the focused borders would be less defined with a larger source.

 

[NeSSuS-GTE]

Hey! Its not too often you see output ratings in MegaNits.
Why do I find that the most interesting part of this press release?

Interesting new form factor, but where's the new LED technology??

Hopefully soon, we'll see a press release like this that really blows our socks off... or more importantly blows the socks of HID lighting.

 

[baterija]

Interesting catch Evil. Thanks for sharing.

That shouldn't be a problem as the light energy itself should be sufficient to melt the ice.

Don't be so sure. Even with halogen headlights and all their IR throwing ice removal goodness I've had occasional reicing issues on headlamps once they are clear. Driving introduces a significant air cooling factor.

 

[bshanahan14rulz]

honestly, it's not the LED that interests me, its the optic. If only I could get my hands on it (for free, I'm not so curious that I'm willing to drop $3000 for a headlamp...)

 

[lolzertank]

And I don't think a dome would be beneficial for this LED's application. It would actually be detrimental to its ends as the focused borders would be less defined with a larger source.

It used to be that if you removed the dome, efficiency went down dramatically because of reflection caused by the different refractive indexes of the die and air. The dome is supposed to reduce those losses in addition to protecting the die.

However Lumileds is doing this, :twothumbs

 

[LukeA]

only 850 lumen??

HID lights are 3200 lumen. this is not going to be very bright

Yes but the fixture efficiency of an HID projector is horrendous. Not so with LEDs.

 

[IMSabbel]

Interesting catch Evil. Thanks for sharing.



Don't be so sure. Even with halogen headlights and all their IR throwing ice removal goodness I've had occasional reicing issues on headlamps once they are clear. Driving introduces a significant air cooling factor.

I have seen designs that use fans /ram-air to circulate air from the heatsinks towards the front window as a de-ice function.

Also, about total lumens:
How much of the light of a HID headlight really goes "out of the front"? All this beamclipping and anti-glare surely kills some intensity...