Who uses Golden Dragon Plus LED's

[insanefred]

Besides Nightcore?

 

[AvidHiker]

I believe Ra Lights has used them in their twisty.

 

[Black Rose]

Sylvania has a bunch of non-flashlight products that use them such as lanterns and the Dot-It lights.

 

[Youfoundnemo]

They seem to be quite nice, they have a small emmiter size and are on par with q5s so in a throwy reflector they could be rather promising

 

[Fallingwater]

I haven't kept myself well informed on EdgeTac's works after the Extreme, and all their lights used Crees up to that point. What did they make that uses Golden Dragons?

 

[Sgt. LED]

EX10 and D10 GD versions maybe?

 

[LukeA]

Do any of those lights make use of the GD's secondary red junction?

 

[jimmy1970]

The Ra Twisty models with low red have Golden Dragon led's.
jr/

 

[Sgt. LED]

No

 

[AvidHiker]

Apparently we won't be seeing any other lights making use of the red junction as it's against manufacturer recommendations and requires a significant current (I think I read ~500ma) to activate. Hence, HDS/Ra is no longer using that mode IIRC. I believe it was intended as a reverse polarity indicator to speed troubleshooting during manufacturing, never intended to be used as a light source and may even be bad for the LED in the long run.

 

[shomie911]

Apparently we won't be seeing any other lights making use of the red junction as it's against manufacturer recommendations and requires a significant current (I think I read ~500ma) to activate. Hence, HDS/Ra is no longer using that mode IIRC. I believe it was intended as a reverse polarity indicator to speed troubleshooting during manufacturing, never intended to be used as a light source and may even be bad for the LED in the long run.

Is it really that bad?

Why would RA have the red mode in there if it would compromise the reliability of their light?

 

[LukeA]

Apparently we won't be seeing any other lights making use of the red junction as it's against manufacturer recommendations and requires a significant current (I think I read ~500ma) to activate. Hence, HDS/Ra is no longer using that mode IIRC. I believe it was intended as a reverse polarity indicator to speed troubleshooting during manufacturing, never intended to be used as a light source and may even be bad for the LED in the long run.

That's right, it's only listed as a protection diode in the datasheet.

I got one in a non-plus GD to fire at 1.45V, 3mA. At that point it was a dim glow, but it was on. It appears to be a standard 5mm-sized junction, so if it's run at 20mA or less it seems like it should be fine for a long time.

I think it's too interesting an inclusion not to use.

 

[AvidHiker]

Is it really that bad?

Why would RA have the red mode in there if it would compromise the reliability of their light?

No clue, maybe (as LukaA suggests) that figure is not entirely correct. Anyway, I'm just assuming there must be some reason they would advise aginst it.

I agree, its a really neat feature - and if it can be used safely then why not?:shrug:

 

[LukeA]

No clue, maybe (as LukaA suggests) that figure is not entirely correct. Anyway, I'm just assuming there must be some reason they would advise aginst it.

I agree, its a really neat feature - and if it can be used safely then why not?:shrug:

I think the recommendation has something to do with the fact that it's not a 'power' junction, i.e. it's not capable of handling the 2.25W of the white GD junction for long periods. But I think if you treat it like a 5mm LED it will be fine.

And even if it does get damaged, it won't affect the functionality of the primary white junction.

 

[jzmtl]

I'm sure Henry knows his stuff and won't use 500ma to produce a couple of lumens. I remember the one used in twisty isn't plus version?

 

[LukeA]

I'm sure Henry knows his stuff and won't use 500ma to produce a couple of lumens. I remember the one used in twisty isn't plus version?

It only takes a few mA to light the red junction.