[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

So what bin XHP35 are you testing? The E4 3C seems to handle 3.11 amps at the emitter really well so far. If you need a E2 to test till it pops I can send you one! :wink:

I could only get my hands on a low bin 90+ CRI emitter myself but if you want to send a higher bin version to pop that would give up some more data for sure.

PM inbound.

Are you guys gonna test XHP35 VS XHP 35 HI vs XHP 35 dedome/shaved dome?

I will test whatever I can get my hands on. At this point that is just the C4 bin 90+ CRI HD version, I would like to test all of the above options ideally.

If I had them all I would like to do some intensity tests as well. I have an SMO L6 reflector that could be used for crude kcd testing I suppose, although it would be interesting setting it up in my normal testing location without a flashlight to drive it.

Thats why i want the finns to be ~2mm thick and 2,5-3mm space in between. This is ok aslong we are not having ultralong finns (15-20mm or so). The longest finns on the GT will be abot 5-7mm deep. So no problem with convection!

I have one question. If i understand it right the light will be having threads at 3 points (the green marked lines). Please correct me if i am wrong

Yes, this is correct.

Nope, more threads on top for the bezel to secure the lens and reflector. Unless the reflector is going to be threaded in from inside, or a retaining ring will hold it in. Either way, still gotta have an opening large enough to fit the 120mm reflector down into the head. :wink:

Bezel will be threaded also won’t it???
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Edit: You beat me to it Dale…… :wink:

Good catch, totally forgot about that.

No it’s a mixture of gasses.

No, air is considered a “fluid”. Look it up if you don’t believe it. A mind is a terrible thing to waste. :wink:

edit:
moved up a page.

Looks good Jerommel. :+1: I’d like to see something like that in a 26650 size.

I may be fluid, but not a fluid as in liquid.
Stuff has 3 phases: Solid, liquid, gas (and plasma too, but that’s unusual).
Maybe it’s a language thing though.

My personal favourite version, kind of ‘finished’ i.m.o.
But anything can be adapted.


So this is a compact head because it follows the shape of the parabola.

Cooling fins not to deep and not too narrow.

Lanyard hole near the bezel for balance (head will not hang down as much)

Anti rolling ‘blocks’

Maybe i’ll do a section drawing with the parts threading on to eachother later.

Hope you like it and inspired by it.

Nobody mentioned “liquid”.
“Fluid” was the operative word. :wink:

In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress. Fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids. Fluids can be defined as substances that have zero shear modulus or in simpler terms a fluid is a substance which cannot resist any shear force applied to it.

Okay, i see.
Must be a language thing, i didn’t now.
But “flow” and “fluid” probably stem from the same Greek or Latin root, and air certainly flows.

:+1: …… probably is a language thing. :wink:

I like the one you just posted. Personally I’d like to see one like that in a 26650 format and smaller head sometime.
Good work. :+1:

I don't understand. Only one, actual, specific, real reflector has been proposed. It looks nothing like the renderiings. I hope that other reflectors that perform even better, step forward. But until then, the renderings look nothing like this either internally or externally, 120mm deep:

We also have not found a manufacture yet, till then we can’t make any further progress on reflector options as we do not know what the possible options are.

Manufacture comes first, reflector comes later.