*BLF LT1 Lantern Project* (LT1 GB is Active! (first batch available)

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dmsoule
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Please add me for a second light. If we can get this in warm white, adjustable or fixed, I’ll definitely purchase two. So hard to find warm led flashlights/lanterns.

RobertB
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The new Zanflare T1 18650 lantern has tint ramping from 2700k to 6500k. And brightness ramping with memory. It remembers both the tint and brightness. The button on top is a touch sensor. About the size of a Fenix CL25R

FBsLights
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DavidEF wrote:
djozz wrote:
BlueSwordM wrote:
I think Tint=255 should equal 4000k, and not 5000k.

I would personally a ramp between 3000k to 4000k.


If the tint goes from 2700K to 5000K, more people and more situations will have their favorite tint, with 254 tints in between there are also more than enough tints between 3000 and 4000K.
I would really like for the tint to ramp between 2700k and 5000k in the way TK described. Some of you guys need to remember that there are others in this world besides yourself and 5000k is still considered Neutral White and is going to be preferable for a huge percentage of people. Not only that, but as djozz said, 4000k is still possible, so you’re not losing anything by it.

That would be fine also. What would you suggest for high CRI emitters?

I’m usually a 4000k to 5000k kind of guy, but for a lantern I thought 3000k might be nice.
The 351D is one of the latest and greatest high CRI emitters and happens to come in 3000k and 4000k.
I also envisioned the emitters spaced around the globe with something like the Q8 LED board and you might want emitters that appear similar (not too different in color).

FB

Persechini
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I’m more of a fan of the 5000K CCT, and in a lantern I guess I would like the 4000K ~ 5000K range, but with variable CCT, I’d be down for much warmer emitters, as long as I still have the option to go to 5000K

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dmsoule wrote:
Please add me for a second light. If we can get this in warm white, adjustable or fixed, I’ll definitely purchase two. So hard to find warm led flashlights/lanterns.

2 lights for dmsoule, interest #s 391, 808.

interest list sorted by entry number

interest list sorted by user names

These links are always updated to the latest versions of the lists by the way.

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carmantl
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Great update on what’s going to be a great lantern. Please add 2 more for me (#38 on list).

sbslider
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carmantl wrote:
Great update on what’s going to be a great lantern. Please add 2 more for me (#38 on list).

you also have 809 and 810 also, 3 total.

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DavidEF
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Persechini wrote:
I’m more of a fan of the 5000K CCT, and in a lantern I guess I would like the 4000K ~ 5000K range, but with variable CCT, I’d be down for much warmer emitters, as long as I still have the option to go to 5000K

Yeah, that’s me too. In fact, with the variable CCT option, I’d probably want as wide a spectrum as possible. But, then, as FBsLights indicated above, the lantern would “look” better when all lit if the LEDs were closer in CCT. I think 3000k to 5000k will be a good range.

Also, I just found out in the new poll for Your favorite CCT for EDC that Clemence even has 2000k HI CRI emitters available. But he says they’re expensive and not very efficient.

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djozz
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DavidEF wrote:
But, then, as FBsLights indicated above, the lantern would “look” better when all lit if the LEDs were closer in CCT. I think 3000k to 5000k will be a good range.

If the light of the leds are blended well, which should be easy with the current design of the lantern, it hardly matters how far the CCT’s of the leds are apart, the spectra just add up to produce a fine intermediate spectrum.
Caseit741
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I am on the list for 1 right now. Please put me down for 2 more. A total of 3.

sbslider
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Caseit741 wrote:
I am on the list for 1 right now. Please put me down for 2 more. A total of 3.

Caseit741, your two additional interest list numbers are 811 and 812, along with 638 for 3 total BLF ultimate lanterns.

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isuckatmakingupnames
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Put me down for one. Do we have an estimate of the price?

Gj
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I assumed I had signed up a couple of years ago, but apparently not. Blushing

Interested in 4, please.

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isuckatmakingupnames wrote:
Put me down for one. Do we have an estimate of the price?

you’re #813 on the interest list. There is no official price estimate. I have been imagining around $40 US, but that’s just my imagination.

Gj wrote:
I assumed I had signed up a couple of years ago, but apparently not. Blushing

Interested in 4, please.

You are signed up now for 4 lanterns, interest list numbers 814-817

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bmengineer
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Going to take my name off the interest list I think. This looks like a great project and I hope it comes to fruition soon, but I don’t want to wait forever, and the prohibitive cost of cells in Canada doesn’t make this practical for me.

Find all my reviews of flashlights and more gear at www.bmengineer.com

sbslider
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bmengineer wrote:
Going to take my name off the interest list I think. This looks like a great project and I hope it comes to fruition soon, but I don’t want to wait forever, and the prohibitive cost of cells in Canada doesn’t make this practical for me.

Sorry to say you were not on the interest list, in spite of being asked to be put on there.

I started updating the interest list on May 16, with Phlip at interest number 757. I think I have gotten everyone added since that time, about 60 lanterns worth.
Hope there are not too many others that have been left off, but you can always check the list on the links below. They cover everyone since day 1.

interest list sorted by entry number

interest list sorted by user names

PocketSammich wrote: I don’t need this, but I want it. Please sign me up.

bmengineer
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Well that all worked out then

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bigdawg
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Please add me to interested list.

BlueSwordM
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@bmengineer, here are some nice high capacity legit 3000mAh cells for you:

https://ebay.ca/itm/4X-PKCELL-ICR18650-3000mAh-3-7V-Li-ion-rechargeable-battery-LED-linterna-bateria/152861897618?hash=item2397477392:g:cM0AAOSwXOVaVy~e

They are legit cells, and they have a valid permit for shipping lithium ion cells, so all is good.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

bmengineer
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Thanks, but in truth I’m realizing pop can lights are a bit larger than what I need for any practical purpose.

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ToyKeeper
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djozz wrote:
If the light of the leds are blended well, which should be easy with the current design of the lantern, it hardly matters how far the CCT’s of the leds are apart, the spectra just add up to produce a fine intermediate spectrum.

Yeah… probably the main blending question is whether the light can get an even distribution of light with two of each emitter, or if it needs three.

bmengineer wrote:
I’m realizing pop can lights are a bit larger than what I need for any practical purpose.

In general, I’d agree. I rarely use anything bigger than 1×18650. But the soda-can form factor may actually make sense for a lantern.

sbslider
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bigdawg wrote:
Please add me to interested list.

added as #818 on the interest list

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I am going to design an eight LED star based on the Q8 four-LED single channel one, but will have eight 3535 pads arranged to offer the best blending of the light tints, and have two channels to control them. ( I have a rough drawing in mind already for that purpose.

As for the other comment I agree that for some cases a tiny single 18650 lantern can work, but the advantage of this Lantern design is much longer run times & output form a lantern that is still small enough to backpack. pushing a lantern past 800+ lumens continuous on a single cell will give barely a night’s worth of run time before it has to be charged. I have many modded lanterns that use a single 18650, but they are somewhat limited to 300 lumens or less to get a night’s worth of run time form a single cell. Thew past test at the camp, the V2 prototype ran on maximum mode for roughly 5 hours per night, and lasted the entire trip without the need for recharging, and when i got home the four 3400mah cells still had 3.83 volts in them.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

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DBSAR, it might be a good idea to look at the various iterations of the Q8 dual footprint LED boards in various threads here so you can see what others came up with and how they dealt with fitment issues and such. I know yours will be different, but it still won’t hurt to see those while you consider how to bring yours to completion.

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I don’t think we should be doing an 8 LED MCPCB.

It would raise costs by quite a bit.

I think 2 Samsung LH351Ds 3000k and 2 Samsung LH351Ds 5000k would be just perfect.

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http://budgetlightforum.com/node/67401
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Typevii
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Please add me to the interest list for one please.

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Typevii wrote:
Please add me to the interest list for one please.

added at #819, Welcome to BLF!! Beer

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angerdan
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BlueSwordM wrote:
I don’t think we should be doing an 8 LED MCPCB. It would raise costs by quite a bit.
I think 2 Samsung LH351Ds 3000k and 2 Samsung LH351Ds 5000k would be just perfect.

In my opinion just one color per order and 4 tints to choose from would be an good solution/compromise. Everyone could get the CCT he wants.
With only two LEDs per CCT you can’t archive an evenly beam. It needs 4 LEDs per CCT to be perfect.
Kendo
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I’m intrested

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The Samsung lh351d is not very expensive, at Digikey when ordering a reel it is 1.22 per led (cool white 70 cri, the high cri versions may be a bit more expensive). So 8 leds add up to about $10 worth of leds, I bet Thorfire gets them even cheaper. It is a significant part of production costs so 2warm/2cool may be more economical, but it is not impossible either.

Another option is doing what the whole lighting industry is doing for a good reason: skip the high power leds (which are developed for directed lighting which we are not doing here) and go with a whole bunch of midpower 3030 leds or 5730 leds. Cheaper per lumen, blending is even easier, ledboard is cheap (DTP not needed) and there’s plenty options for tint and high CRI.

Heck, you could use 3000K and 5000K Nichia Optisolis leds and beat everything existing in CRI.

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