*BLF LT1 Lantern Project) (updated June,02,2020)

11166 posts / 0 new
Last post
DBSAR
DBSAR's picture
Offline
Last seen: 5 hours 34 min ago
Joined: 02/11/2013 - 23:28
Posts: 6293
Location: Ontario, Canada
bmengineer wrote:
Is it intended that the lantern is water resistant? The schematic shows an o-ring at the base of the diffuser, but nothing at the top or around the center screw

Thanks for mentioning that to remind me i missed adding that to the drawing. Big Smile i did forget to add the upper rubber gasket/o-ring to the head & the small o-ring to the center bolt. (next updated drawing will have those)

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

junglejim13660
Offline
Last seen: 7 months 4 weeks ago
Joined: 02/08/2018 - 12:11
Posts: 17
Location: Syracuse, NY

Could you please put me on the list for one light.

Thank You

Phlogiston
Phlogiston's picture
Offline
Last seen: 2 hours 46 min ago
Joined: 10/27/2016 - 16:57
Posts: 952
Location: Scotland

This really is coming along nicely Thumbs Up

Is the tint range finalised at 3000K to 4000K?

I was rather hoping for 3000K to 5000K, because that would cover everything I ever do with artificial light, from reading at night to workshop stuff, respectively.

I understand that LEDs aren’t always available with high CRI at the cooler colour temperatures, though, so no worries if that’s the case. High CRI is more important to me here Smile

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 17 hours 42 min ago
Joined: 11/29/2017 - 12:34
Posts: 5534
Location: Canada

That is not the problem though.

We can get 90CRI LH351D in 5000k.

I actually ordered some. The problem? They are going to take 6 weeks to lead time.

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

Zulumoose
Zulumoose's picture
Offline
Last seen: 2 months 1 week ago
Joined: 04/13/2017 - 09:25
Posts: 859
Location: South Africa
Quote:
I was rather hoping for 3000K to 5000K, because that would cover everything I ever do with artificial light, from reading at night to workshop stuff, respectively.

Ditto on that. 3000 to 5000 would keep far more people happy than 3000 to 4000, without losing anything or costing more I suspect. Look at the reports on the Zanflare T1 that have come in recently, thus far there seems to be a preference for the two extremes rather than for a level in between by those who have been playing with them.

Beam me up!

sbslider
sbslider's picture
Offline
Last seen: 6 days 7 hours ago
Joined: 01/22/2017 - 13:41
Posts: 1570
Location: United States
DBSAR wrote:
vestureofblood wrote:
I would be interested in this, please add me to the list.

added! number 849 on the list.


check. just a note to VOB, you also are 620 on the interest list for 2 lanterns total
peabody wrote:
Interested in two please.

double check, numbers 850 and 851 on the interest list
arisdes wrote:
Put me on the list for one please.

check for arisdes as number 852 on the interest list
Madtoffel wrote:

And please add me for a second one.

Got it, your second one is number 853 on the interest list
asciiphil wrote:
Definitely interested. Those Samsung LEDs look really nice.

asciiphil you are number 854 on the interest list
junglejim13660 wrote:
Could you please put me on the list for one light.

Thank You


junglejim13660 is number 855 on the interest list

interest list sorted by entry number

interest list sorted by user names

All caught up for now.

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

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 17 hours 42 min ago
Joined: 11/29/2017 - 12:34
Posts: 5534
Location: Canada

@Zulumoose, that is easily done. There have already been tests of the 5000k LH351D, so just asking Thorfire to put in 3xLH351D 5000k 90CRI and 3xLH351D 3000k 90CRI is really easy.

The reason we considered only 3000k and 4000k options were because DBSar did not test them.

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

DBSAR
DBSAR's picture
Offline
Last seen: 5 hours 34 min ago
Joined: 02/11/2013 - 23:28
Posts: 6293
Location: Ontario, Canada

Phlogiston wrote:
This really is coming along nicely Thumbs Up

Is the tint range finalised at 3000K to 4000K?

I was rather hoping for 3000K to 5000K, because that would cover everything I ever do with artificial light, from reading at night to workshop stuff, respectively.

I understand that LEDs aren’t always available with high CRI at the cooler colour temperatures, though, so no worries if that’s the case. High CRI is more important to me here Smile

If i had some LH351 high CRI 5000K LEDs i would test those too. Right now i am testing the 3000K & 4000K because i have these, and modifying the V1 to use four of the 3000K LEDs to be able to do a direct comparison to the 4000K variants while on my trip.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Jagger
Offline
Last seen: 1 month 3 weeks ago
Joined: 06/18/2018 - 16:34
Posts: 6
Location: United States

Interested in one.

contactcr
Offline
Last seen: 6 hours 47 min ago
Joined: 05/19/2017 - 18:52
Posts: 3026
Location: US

Put me down for 1 if I am not already on the list

bmengineer
bmengineer's picture
Offline
Last seen: 5 hours 8 min ago
Joined: 01/26/2018 - 11:38
Posts: 977
Location: Ontario, Canada

No problem – if there’s one thing I’ve learned through work it’s how to point out missing things on drawings. Let me know if you need help or a more detailed cross-section for Thorfire.

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

contactcr
Offline
Last seen: 6 hours 47 min ago
Joined: 05/19/2017 - 18:52
Posts: 3026
Location: US

Btw DigiKey has the 2700K and 5000K 90CRI immediately available so not sure why it was mentioned about 6 week lead time.

https://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SPHW...

https://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SPHW...

About $8 for FedEx international priority which is (1-3 days I think)

  • you have to use the .ca site
apt323
apt323's picture
Offline
Last seen: 18 hours 56 min ago
Joined: 03/19/2012 - 20:18
Posts: 1551
Location: North Texas

add me for another please.

Thank you

leo l.
leo l.'s picture
Offline
Last seen: 3 days 19 hours ago
Joined: 01/23/2016 - 15:59
Posts: 14
Location: Schleswig-Holstein

I’m interested, please add me.
Leo

Regards
Leo

cu42
Offline
Last seen: 5 months 1 day ago
Joined: 02/20/2018 - 14:47
Posts: 182
Location: Allbright, IN

Has there been any more interest or discussion on the reflector/deflector to allow adjustment or partial blocking of the output from something other than full time 360 degrees?

My thoughts were that it could snap into grooves at the top heatsink and bottom base plate in order to rotate or be quickly removed.

It would not only block light from selected areas of the 360 pie, but reflect blocked light (white front side black back side) back to lighted areas possibly allowing lower settings to be used for more efficiency. Less output and energy would be wasted if directed only to areas where it is needed and not to unwanted areas.

I have made makeshift shields in the past to block light from shining in certain peoples faces or tents and motorhomes with sleeping people etc. For me, having this all available in a well designed manner on this lantern would be the cats meow. There seems to be occasions where I don’t want or need a full 360 degrees of dispersion whether being carried or hung stationary. 180-270 degrees gets the most use from me.

Stereodude
Offline
Last seen: 7 months 2 weeks ago
Joined: 03/16/2013 - 21:14
Posts: 521
Location: US of A

5000K seems on the cold side for a lantern. I’d think 4000K would be better, or perhaps two 3000K + two 4000K LEDs if they mix reasonably well and don’t end up with color casts that shift over angle.

nquinn
Offline
Last seen: 2 days 7 hours ago
Joined: 09/11/2017 - 21:55
Posts: 263
Location: DC

Does anyone else think the profile just feels tall for a lantern? i.e. the tall base/battery compartment combined with a tiny little lantern top above.

I realize this is based off of an existing light to save time, but the aesthetic feels weird to me.

I’d love to see a smaller version – maybe like 1 or 2 18650’s that sit horizontally to reduce height and size.

sbslider
sbslider's picture
Offline
Last seen: 6 days 7 hours ago
Joined: 01/22/2017 - 13:41
Posts: 1570
Location: United States

Jagger wrote:
Interested in one.

number 856 on the interest list

contactcr wrote:
Put me down for 1 if I am not already on the list

only on the interest list once at number 857

apt323 wrote:
add me for another please.

Thank you

Got a third lantern at number 858 on the interest list
leo l. wrote:
I’m interested, please add me.
Leo
you are added at number 859 on the interest list

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

djozz
djozz's picture
Offline
Last seen: 1 hour 3 min ago
Joined: 09/07/2012 - 17:04
Posts: 17013
Location: Amsterdam

nquinn wrote:
Does anyone else think the profile just feels tall for a lantern? i.e. the tall base/battery compartment combined with a tiny little lantern top above.

I realize this is based off of an existing light to save time, but the aesthetic feels weird to me.

I’d love to see a smaller version – maybe like 1 or 2 18650’s that sit horizontally to reduce height and size.

I would not think that functionally the length is a problem, but of course the general reference being a kerosine lantern, the proportions feel off. I have been looking at it but at least when using the 4 18650 batteries in this orientation, the lantern is bound to be about as tall as the prototype, give or take 1 or 2 cm.

DBSAR
DBSAR's picture
Offline
Last seen: 5 hours 34 min ago
Joined: 02/11/2013 - 23:28
Posts: 6293
Location: Ontario, Canada

cu42 wrote:
Has there been any more interest or discussion on the reflector/deflector to allow adjustment or partial blocking of the output from something other than full time 360 degrees?

My thoughts were that it could snap into grooves at the top heatsink and bottom base plate in order to rotate or be quickly removed.

It would not only block light from selected areas of the 360 pie, but reflect blocked light (white front side black back side) back to lighted areas possibly allowing lower settings to be used for more efficiency. Less output and energy would be wasted if directed only to areas where it is needed and not to unwanted areas.

I have made makeshift shields in the past to block light from shining in certain peoples faces or tents and motorhomes with sleeping people etc. For me, having this all available in a well designed manner on this lantern would be the cats meow. There seems to be occasions where I don’t want or need a full 360 degrees of dispersion whether being carried or hung stationary. 180-270 degrees gets the most use from me.

good points. it was mentioned before and can be an accessory possibly to add.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
DBSAR's picture
Offline
Last seen: 5 hours 34 min ago
Joined: 02/11/2013 - 23:28
Posts: 6293
Location: Ontario, Canada
bmengineer wrote:
No problem – if there’s one thing I’ve learned through work it’s how to point out missing things on drawings. Let me know if you need help or a more detailed cross-section for Thorfire.

Thanks Smile definitely a better CAD or cross section for Thorfire would be beneficial.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
DBSAR's picture
Offline
Last seen: 5 hours 34 min ago
Joined: 02/11/2013 - 23:28
Posts: 6293
Location: Ontario, Canada

nquinn wrote:
Does anyone else think the profile just feels tall for a lantern? i.e. the tall base/battery compartment combined with a tiny little lantern top above.

I realize this is based off of an existing light to save time, but the aesthetic feels weird to me.

I’d love to see a smaller version – maybe like 1 or 2 18650’s that sit horizontally to reduce height and size.

for using four 18650’s to get the run times including the output which is the main intention of this project, its size is not bad really. the current height works much better for resting on tables than any flatter shorter lanterns i have for illuminating a table top, and its already much smaller & shorter than any other factory lantern i have used that can even match half the output of this lantern.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

joechina
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/05/2016 - 08:23
Posts: 1439
Location: Germany

I am interested in one.

joechina
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/05/2016 - 08:23
Posts: 1439
Location: Germany

For the rubber seal of the USB:
Utorch UT02 and Manker 22 Manker 21 have round ones which are pretty good. They have two sealing lips and they are better than any rectangular ones I have seen.
Maybe we can get the same type of covers for the charging port?

DavidEF
DavidEF's picture
Offline
Last seen: 12 hours 37 min ago
Joined: 06/05/2014 - 06:00
Posts: 7699
Location: Salisbury, North Carolina, USA

I understand that some people seriously don’t want 5000K LEDs in their lantern, but I still don’t understand why it’s a problem. If the CCT mixing works right (it should, because TK is writing it) then you can use anything from the bottom (currently 3000K) up to the top, but you don’t HAVE to go to the top! You could STILL use only lower CCT. But, it doesn’t work the other way. If there is no 5000K, then those of us who WOULD use it CAN’T.

DBSAR, this isn’t directed at you. I know you’ve already responded that you don’t have any 5000K emitters to test with. This is just a call-out to those who are adamant that the light should absolutely NOT ship with 5000K emitters installed. I don’t understand why they keep insisting on that.

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

joechina
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/05/2016 - 08:23
Posts: 1439
Location: Germany

ToyKeeper wrote:
It already has a sunset mode, which fades from ~15 lm to zero over a period of about an hour, then shuts itself off.

For the candle, I’ll probably make it stay steady until the last minute or so, then fade and snuff out.

Can you add a 3 minutes versio of sunset? Or 2,5min on a certain level and then dim to zero?
It is nice when you are in a cold tent in winter time and you zip your sleeping bag

joechina
Offline
Last seen: 2 months 3 weeks ago
Joined: 03/05/2016 - 08:23
Posts: 1439
Location: Germany

Xiaomi has a desk lamp which does color mixing up to 6500K
It’s for to stay awake.
Here is a review from budda
http://www.candlepowerforums.com/vb/showthread.php?421768-Review-of-Xiao...

soldsoulrockroll
Offline
Last seen: 4 months 4 weeks ago
Joined: 06/21/2018 - 15:09
Posts: 7

Interested in one

Thanks

Stereodude
Offline
Last seen: 7 months 2 weeks ago
Joined: 03/16/2013 - 21:14
Posts: 521
Location: US of A

DavidEF wrote:
I understand that some people seriously don’t want 5000K LEDs in their lantern, but I still don’t understand why it’s a problem. If the CCT mixing works right (it should, because TK is writing it) then you can use anything from the bottom (currently 3000K) up to the top, but you don’t HAVE to go to the top! You could STILL use only lower CCT. But, it doesn’t work the other way. If there is no 5000K, then those of us who WOULD use it CAN’T.

DBSAR, this isn’t directed at you. I know you’ve already responded that you don’t have any 5000K emitters to test with. This is just a call-out to those who are adamant that the light should absolutely NOT ship with 5000K emitters installed. I don’t understand why they keep insisting on that.

Well, you lose brightness at either extreme because you have half the number of LEDs, unless the plan is to make that not happen by limiting the brightness when all 4 LEDs are on so that brightness is constant over color temp. If the color temp is adjustable, I hope it’s done in a way that the light remembers the color temp between power cycles so you don’t have to set it every time it’s turned on.

Personally, I don’t think 4 LEDs is enough to make adjustable color temp work. The two lanterns I have with have many more LEDs and a lot more diffusion for color mixing.

Example 1 / Example 2

DavidEF
DavidEF's picture
Offline
Last seen: 12 hours 37 min ago
Joined: 06/05/2014 - 06:00
Posts: 7699
Location: Salisbury, North Carolina, USA

Stereodude wrote:
Well, you lose brightness at either extreme because you have half the number of LEDs
To me, this would be even more reason to make the extremes more extreme. Then, you get a wider range of CCT that still includes all the emitters. However, if you think about a current regulated driver, the only light you’ll really be missing is the difference in efficiency going from one set of LEDs to the other (cooler CCT emitters get more lm/w output) and going from 4/6 emitters to just 2/3 emitters (LEDs are more efficient at lower wattage, so same current going to fewer LEDs will mean higher wattage per LED, so lower efficiency). Those differences in efficiency will probably NOT make a noticeable difference in output as seen by the eye. But, I still want a wide CCT range, because I just do! Innocent

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

Pages