Osram Ostar

[ovlovder]

I have been considering an Osram Ostar LED as a single emitter, possibly in an MR11 package as I believe Ledil has a 35mm optic.

See here

Higher voltage, but just over 500 lumen in a single emitter.

 

[dom]

I think alot of people are also considering the same thing now that optics,drivers and stars are becoming available to make this a viable bike lite.

Your link isn't there for the Ledil optic

Cheers
Dom

 

[MtLuke]

I seem to remember a link a few weeks back regarding Osram LED's
Some amazing beam shots. I don't know what optics or any particulars but in general they can generate up to about 1000 lumens with one LED. You just need to have 18 volts to run it properly.

Eric S

 

[ovlovder]

How about this


http://www.ledil.fi/pages/3099/

 

[dom]

Yes -they look good -had just ordered some of those from Cutter
Khatod have smaller diameter ones.

 

[chris_m]

http://www.khatod.com/pdf/pl271_ostar_test_report.pdf

 

[ovlovder]

http://www.khatod.com/pdf/pl271_ostar_test_report.pdf

Was looking at those...

 

[SteveDavis]

For anyone interested, you can buy an Ostar in the 610-1100 lumen range here. Search for LE UW E3B-PZQZ-4C8F

 

[cytoe]

is this an ostar? http://www.dealextreme.com/details.dx/sku.5848

anyone know what deg output the ostar emits? narrow like the crees or wide like seouls?

 

[ovlovder]

120-130 degree output from ostars, depending on model.

No thats not an ostar.

 

[ovlovder]

For anyone interested, you can buy an Ostar in the 610-1100 lumen range here. Search for LE UW E3B-PZQZ-4C8F

here they are $42 plus shipping.

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=475-1295-ND

May have a line on some cheaper soon!

 

[MtLuke]

http://forums.mtbr.com/showthread.php?t=344013&highlight=1000+lumen+mistake
Check out this link pertaining to the Ostar.

Eric S

 

[diff_lock2]

I think the tri-rebel would be better... Or you could make your own 3x2 array of rebels. But optics would be a problem. And soldering.

 

[chris_m]

Given you can get optics for an Ostar, but not for a tri-rebel (the idea of trying to design an optic for that is a complete nightmare), why would the latter be better?

 

[diff_lock2]

More flux density.... Is that even proper terminology... I think the ostar is only 50lm per watt. Rebels are above the 100 mark...

 

[chris_m]

65lm/W at 350mA (which is where you get just under 100lm/W with a Rebel). You'll actually get even better than that with the Ostar if you drop the input current to 175mA which is the same power input as a tri-rebel. Anyway lumens are no good if you can't focus them, which is the problem with the tri-rebel. You can make a useful light with decent throw and compact size with the Ostar - with a tri-rebel you can't.