I just ordered a triple Luxeon deep red mounted on a direct thermal path SinkPad II.
Deep Red Rebel
It says max current 700mA, but also states that “Higher drive currents may be possible, but will require careful design of a suitable cooling system.”
I plan to run this DTP triple in an S2+ with a copper heatsink, and was wondering how high in current I can take it.
I have one of these leds and did a quick output test on a Rebel Sinkpad before doing the mod at the time. I never documented it but I think I remember that just like most colour leds 1.5A is a sweetspot, over 2A the output already drops.
I have three from rapid led on aluminium stars but only two are in lights. One is mounted in a 502b @ 1400ma and the other is in a JacobA60 at either 1750 or 2100ma. They have held up fine but can’t see lumen benefit from a ceiling bounce test. Both of mine are single mode lights with 7135 based drivers.
Hmmmm. After pretty much only using DD FET drivers for a while, it will seem weird going back to a 7135 driver. Like having an Amish flashlight.
So how many color emitters — in serial, and how many in parallel — would work and be enough to avoid blowing them up, feeding power through with a single li-ion and FET?
I probably need to just start blowing a few up to get this into my dense head, but any forewarnings would help.
I guess it depends on the cell you use. For three emitters to n parallel, you’d wan 4,5-5A max, so would need a real crappy 18650 with a protection circuit. I’m not sure what an 18350 would put out on DD, it could be the answer. Make my light an S2+ shorty.
Lifepo4 might be your answer. I used one to DD a PT54 red at about 8A. Don’t know about now but Tenergy did offer 3 different capicity/output cells. Typically high capacity Lifepo4 cells offer lower amperage output. Find some spec info. HTH
I posted my build for a Rebel deep red triple in the mod thread, but figured I should add the beam shots to rollinstone’s thread on coloured rebel emitters for thread integrity. It’s running at 4.5A.
Z
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Roxanne. ….don’t turn on the red light!
The deep red rebels are a bright cherry red as compared to the orange red of the XP-E2. These are nice emitters and pack a lot of light. I don’t know why everyone is a afraid to try a non Cree LED.
Bravo. And for cross-references, several others along this line fairly recently
WTB Deep Red LED Flashlight or build one for me …
http://budgetlightforum.com/node/43330
EDC flashlight with red light | BudgetLightForum.com
EDC flashlight with red light - 18650 Flashlights - BudgetLightForum.com
Thrower for Hunting - Any Opinions? | BudgetLightForum.com
Thrower for Hunting - Any Opinions? - LED Flashlights – General Info - BudgetLightForum.com
Joat’s build thread not for the contest. Color mixing Red Orange …
http://budgetlightforum.com/node/40551
OK. But are there any convenient places to get them not in bulk quantities and with shipping price not through the roof?
> convenient places
Depends mostly on where you live.
’oogled: "luxeon rebel" "deep red" - Google Search
Aside I went looking for little tiny Rebel mounting boards — wanting to try them in 1xAAA lights.
Does anyone know of a 9mm board that would fit into the BLF348?
(There are some 10 or 11mm boards that might be possible to file down)
This isn’t what I was looking for, it’s an old CPF thread, but it’s an interesting approach I don’t recall seeing, insulating the bottom and soldering to the top.
I’ve used LuxeonStar’s 10mm square Sinkpad bases (newer, recommended)
http://www.luxeonstar.com/sinkpad-10mm-square-leds
They drop perfectly into round openings sized for 16mm round boards (need a solid pill or add a solid back plate to fill the hole)
The 7.6mm looks great! Australia, well OK, USPS priority mail is under $8 US, to get ten boards. I see a learning curve ahead of me ….
For next time, anyone know a US supplier for those?
Edit: somehow I misread “ogazent” as “ozagent” — he’s a US supplier.
And he has a bunch more of those little 7.6mm boards for Rebels, and will be putting up more mounted LEDs on those small boards (one time, discount) soon (batch he ordered came the wrong size so he’s clearing them out)
Can’t you file down those 10mm square pads?
> file down …?
Maybe, but to get down to 8.5mm means filing well into the pads:
-The Australian guy had only three of the smaller pads (now he has none). so I may want to try filing at some point.
I think the problem with the rebels is that they are really designed for optics which sit on top of the emitter. Because of their shape, they sit on the pad off center. There aren’t any centering isolators designed for standard reflectors, and the low profile will have the reflector sitting on the wires.