*BLF LT1 Lantern Project) (updated Nov,17,2020)

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DBSAR
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osb40000 wrote:
WaylonJennings wrote:
I read on another thread that the lantern project is going for about 500 lumens on max. Is this true? I would imagine that this might be about the highest output that I would need much of time, but it sure would be nice to have access to a higher turbo level for those times where more light is needed.

I sure hope it’s a lot more than 500 lumens, that isn’t much for times where you’re trying to light up a decent sized camp. That said, when it’s pitch black out, your eyes adjust pretty well to lower light levels.

I have not measured it for lumens accurately, but it is the second brightest LED lantern i have (out of dozens of modded ones i built & modded) the problem is it can not be pushed to bright because of its compact size, ( there is not enough heat-sinking metal to prevent it from over heating. Lanterns differ from flashlights in that lanterns run continuously for hours at a time. Even with just two 7135 chips, on high, (at .700 amps) after a hour running the solid aluminum heatsink top gets hot. When i ran it with three 7135s at 1.05 amps, it got to hot to hold ot touch after a hour. it produces more light output thana 40 watt Incandescent light bulb, to push it brighter woudl require a much larger finned top heatsink. (thus it won’t be pocket-sized anymore.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

WaylonJennings
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WaylonJennings wrote:
I read on another thread that the lantern project is going for about 500 lumens on max. Is this true? I would imagine that this might be about the highest output that I would need much of time, but it sure would be nice to have access to a higher turbo level for those times where more light is needed.

I am actually not sure what 500 lumens from this lantern will look like. I am sure that it will be more than enough for campfires and cat fishing on the riverbank. If I need more light I will use more than one lantern. Smile

bmengineer
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Will the lantern collapse when not in use? Or will you have to pack all that space with it?

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

DBSAR
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bmengineer wrote:
Will the lantern collapse when not in use? Or will you have to pack all that space with it?

no. (I don’t see how it would be possible to collapse a beer-can sized lantern with 4 18659 cells in it, would drive the price up to high.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
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WaylonJennings wrote:
WaylonJennings wrote:
I read on another thread that the lantern project is going for about 500 lumens on max. Is this true? I would imagine that this might be about the highest output that I would need much of time, but it sure would be nice to have access to a higher turbo level for those times where more light is needed.

I am actually not sure what 500 lumens from this lantern will look like. I am sure that it will be more than enough for campfires and cat fishing on the riverbank. If I need more light I will use more than one lantern. Smile

The demonstration photos in the OP shows how bright it is to an extent. ( the first photos shows its brighter than a Coleman Fuel pressure camp lantern.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

osb40000
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I’m extremely excited for this lantern. Please take your time and do it right. I think most of us are plenty patient and just want a polished end product. Thank you for tackling this project!

DBSAR
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I am changing jobs in 3 weeks, so I have to concentrate on that for the next few weeks,. but after the change over I will have much more free time to focus on the lantern project finally. ( considering over the last year my life has been chaos with nearly no free time to work on projects.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

igeigeige
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interested. please include me in the list

MichielSanders
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DBSAR wrote:
I am changing jobs in 3 weeks, so I have to concentrate on that for the next few weeks,. but after the change over I will have much more free time to focus on the lantern project finally. ( considering over the last year my life has been chaos with nearly no free time to work on projects.

Good luck with your new job Party

Olight: M3XS-UT, S Mini CU, R50 CU, R50 Pro LE, M2R, I3T Cu, S30R III, Marauder X6, X7R, X9R - BLF: Q8, A6, GT, GT mini - Emisar: D1s, D4Ti - Reylight: Tripple Dawn, Ti Lan 

Nitecore: TM26GT, SRT9, EC11, T5s, P05Pink, LA10, HC33, HC70 - Fenix: TK75Vn FiatLux, TK76, CL05, CL09 -  Lumintop: Tool Ti, IYP365Ti - Astrolux: MF01 Lexel driver - FourSevens: Maelstrom MMU-X3 

Paul321
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DBSAR wrote:
I am changing jobs in 3 weeks, so I have to concentrate on that for the next few weeks,. but after the change over I will have much more free time to focus on the lantern project finally. ( considering over the last year my life has been chaos with nearly no free time to work on projects.

Best of luck on the new job, I know how stressful a new gig can be. Smile

Paul-

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DBSAR wrote:
WaylonJennings wrote:
WaylonJennings wrote:
I read on another thread that the lantern project is going for about 500 lumens on max. Is this true? I would imagine that this might be about the highest output that I would need much of time, but it sure would be nice to have access to a higher turbo level for those times where more light is needed.

I am actually not sure what 500 lumens from this lantern will look like. I am sure that it will be more than enough for campfires and cat fishing on the riverbank. If I need more light I will use more than one lantern. Smile

The demonstration photos in the OP shows how bright it is to an extent. ( the first photos shows its brighter than a Coleman Fuel pressure camp lantern.


According to the CREE PCT, a XP-L V3 @700mAh would produce about 331 lumens. I prefer brighter, but as has been said, a lantern is different from a flashlight, and that may be plenty of light, if the lantern is well designed to put the light where it is needed.

Interestingly, a XP-G3 S6 would give us ~373lm @700mAh, and have a lower Vf than the XP-L V3, and is probably cheaper to buy.

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

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Yes, finding the most efficient LED at the aimed current would be verry usefull.
Perhaps a good CRI would be nice too.

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I haven’t really thought about emitter choice for this project… I’m not very involved in the hardware. Maybe XP-G3 would be good, or maybe 219c, or maybe XP-L or XP-L2, or … etc. I hope it’ll be high-CRI though, and hopefully no warmer than 4000K. 219c 4000K could be good.

It’s worth mentioning that high CRI isn’t going to be as efficient.

Nicolaas
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Nichia 219C would be nice – good CRI and neutral white.

Cheers
Nico

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Take care of you source of income first, so you will have money to buy more lights Smile

808Hi
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Interested

solRNY
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Count me in for a BLF Lantern, thanks!

ssschen
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If interest list is still being updated, I like to be added to it. Thanks Smile

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I wouldn’t want a camp lantern over 4000k. The Fenix CL25R lanterns are in the 5000k region I believe. Bought some Lee filters to warm them up

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RobertB wrote:
I wouldn’t want a camp lantern over 4000k. The Fenix CL25R lanterns are in the 5000k region I believe. Bought some Lee filters to warm them up

Given that this is BLF, I’m willing to bet the emitter will be easy to swap if you aren’t happy with it out of the box. Hopefully we can an update on the design soon!

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

nqcken
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add me to the list , 4000k hi cri pls

RobertB
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bmengineer wrote:
RobertB wrote:
I wouldn’t want a camp lantern over 4000k. The Fenix CL25R lanterns are in the 5000k region I believe. Bought some Lee filters to warm them up

Given that this is BLF, I’m willing to bet the emitter will be easy to swap if you aren’t happy with it out of the box. Hopefully we can an update on the design soon!

Yup, I’m number 31 on the list from two years ago.

WaylonJennings
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The last time I remember LED Temp being discussed I recall an XPL 3200K to 4000K being the most likely range.

While I am very excited to see this project progress, I understand that it takes time to do things right and that is the way we all want it.

Enelooper
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Please put me down for one. Thanks!

trigger619
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Please add me to the list
for 2. thanks

DavidEF
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RobertB wrote:
I wouldn’t want a camp lantern over 4000k. The Fenix CL25R lanterns are in the 5000k region I believe. Bought some Lee filters to warm them up

I’d prefer around 4500K, but anything in the range of 4000K to 5000K would be okay with me, as long as it doesn’t have a sickly tint. High CRI would be nice as well. If you’re going out in nature, you might as well see it as God intended! Wink

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

turkey
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Interested in one.

Thanks.

nquinn
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Any chance you’d also consider making a mini version to hang in tents?

Something like single cell (AA or 18650), candle to incandescent temperature range (~2000k), lightweight, 360* diffuser, cheap. Should include some kind of clip or ability to hang it to a tent ceiling loop.

I don’t understand why people want lanterns in the 4000-5000k range. That introduces blue light which is artificial and will make it harder to sleep because it messes with circadian rhythms.

DavidEF
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nquinn wrote:
Any chance you’d also consider making a mini version to hang in tents?

Something like single cell (AA or 18650), candle to incandescent temperature range (~2000k), lightweight, 360* diffuser, cheap. Should include some kind of clip or ability to hang it to a tent ceiling loop.

I don’t understand why people want lanterns in the 4000-5000k range. That introduces blue light which is artificial and will make it harder to sleep because it messes with circadian rhythms.


Wait, did I read that correctly?Are you really saying that blue light is artificial?

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

nquinn
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DavidEF wrote:
nquinn wrote:
Any chance you’d also consider making a mini version to hang in tents?

Something like single cell (AA or 18650), candle to incandescent temperature range (~2000k), lightweight, 360* diffuser, cheap. Should include some kind of clip or ability to hang it to a tent ceiling loop.

I don’t understand why people want lanterns in the 4000-5000k range. That introduces blue light which is artificial and will make it harder to sleep because it messes with circadian rhythms.


Wait, did I read that correctly?Are you really saying that blue light is artificial?

Artificial as in it doesn’t normally appear at night and messes with our circadian rhythm.

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