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

11539 posts / 0 new
Last post
DBSAR
DBSAR's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada

ToyKeeper wrote:
About 2700K vs 3000K, last I checked, the 3000K emitters go one efficiency bin higher than 2700K. So 3000K would probably be about 6% brighter than 2700K. They’re rated at 340 lm vs 360 lm, while 5000K is at 400 lm.

So, that might be a consideration.

  • 2700K + 5000K: 17.6% brightness difference
  • 3000K + 5000K: 11.1% brightness difference

Aside from this 11% or 17% difference though, the brightness should stay constant while changing tint.

if i only had the 2700K & 5000K to test, but right now i only have the 3000K & 4000K LH351 series LEDs to test.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Coscar
Coscar's picture
Offline
Last seen: 10 hours 37 min ago
Joined: 01/03/2016 - 20:16
Posts: 758
Location: Gulf Coast
peabody wrote:
ToyKeeper wrote:
peabody wrote:
BLF/AI Looks like artificial intelligence but it’s Area Illumination I thought about Artificial Sun Shine but those three letters seem wrong when put together. Innocent

That second name would be more appropriate if the light had a $1000 price tag and fancy marketing about how it was handmade by virgin monks, with uniquely advanced quantum engineering inside, to cure all manner of physical, emotional, and spiritual ailments. Because then it would be pretty undeniable that we think the sun shines out of our, um, “Artificial Sun Shine”. Big Smile

(At least the part about quantum engineering would be true. All common computer chips rely on quantum mechanics in order to function, because that’s how transistors work.)


That is the funniest thing I’ve read in a long time.
Not only are you the smartest person I currently know (as far as light goes)your eloquent writing and sense of humor could propel you into a successful comedy writer career or a stand up comedian.

TK is indeed a special person…….. Ive thought of PMing her and telling her just that but then I thought, No, she would probably be more annoyed than impressed with any praise ……

Im not a Pessimist …. just an Optimist with a lot of experience


A little John Prine

fuzun
Offline
Last seen: 2 months 3 weeks ago
Joined: 02/11/2017 - 13:37
Posts: 198

Logo idea:

DBSAR
DBSAR's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada

- Currently modifying the V1 Prototype lantern to run four LH351 3000K LEDs to do direct comparisons to the LH531 4000K LEDs that are in the V2 prototype now. I don’t have another Q8 MCPCB so i flowed the emitters on four 16mm Cree stars and will work with those to get the V1 as close to the pattern as the V2. (photos of comparisons coming soon.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 2 days 12 hours ago
Joined: 11/29/2017 - 12:34
Posts: 5574
Location: Canada

These are 351Bs and not 351Ds though. The efficiency difference might be quite large, but still interested to see.

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

atbglenn
atbglenn's picture
Offline
Last seen: 1 year 11 months ago
Joined: 07/29/2011 - 12:04
Posts: 5767
Location: Long Island, New York

Interested

Boycott Nike

DBSAR
DBSAR's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada
BlueSwordM wrote:
These are 351Bs and not 351Ds though. The efficiency difference might be quite large, but still interested to see.

indeed, the die of the 351B is a bit smaller than the 351D 4000K. (i’m guessing like comparing the 119 Nichia to the 219 Nichia.) in this case its more of comparing the tint as these are the only two typs of 351 Samsung LEDs i have to test on this trip. (the 351D 3000K or 2700K high-CRI and the 351D 5000K high-CRI LEDs would be a good comparison for the tint ramp options.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

DBSAR
DBSAR's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada

Ok, here are the first photos comparing the 4000K Samsung 351D LEDs to the 3000K 351B LEDs. I modified the V1 of the lantern to use four LEDs the same as the V2 prototype uses, Because i only have the 351B 3000K versions, they are less efficient than the 351D versions, (They are sort of like comparing the 119 series Nichias to the 219 series, as the 351B has a smaller die than the 351Ds. So in this case i have to increase the amps to the LEDs to get the same brightness output. In the photos below, the 4000K High-CRI is on the left, and the 3000K High-CRI is on the right. ( images are gamma-corrected and adjusted to appear what the eyes see depending on your monitor settings)
The 4000K V2 on the left is on mode-4 at roughly 1-amp to the emitters, & the 3000K has roughly 1.3 amps to the emitters. (first photo is 1/320 shutter, F2.7, D5100 Nikon, second is 1/180 shutter, F2.7, D5100 Nikon) To the eye the 3000K has a very nice incandescent light tint, while the 4000K has a nice pure white tint slightly whiter than a good halogen.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 2 days 12 hours ago
Joined: 11/29/2017 - 12:34
Posts: 5574
Location: Canada

Wow. I had not seen that 351B before. A pure warm white with a lot of reds.

Looks amazing.

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: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada

BlueSwordM wrote:
Wow. I had not seen that 351B before. A pure warm white with a lot of reds.

Looks amazing.

indeed, i really like both these tints in these new Samsung 351 series LEDs. They are high CRI, and have a really pleasing tint, with much lower tint-shift that the Cree XP-L series has.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

lohtse
lohtse's picture
Offline
Last seen: 5 months 4 days ago
Joined: 05/19/2017 - 04:18
Posts: 328
Location: UK

DAMN no want one of both emitters!!!!!!!!!!!!

Problemes d'erection [url=https://www.viagrasansordonnancefr.com/]viagrasansordonnancefr.com[/url] meilleure pharmacie

ToyKeeper
ToyKeeper's picture
Offline
Last seen: 3 days 17 hours ago
Joined: 01/12/2013 - 14:40
Posts: 10654
Location: (469219) 2016 HO3
lohtse wrote:
want one of both emitters!!!!!!!!!!!!

There is a good chance it will be able to change tint. So… it’ll probably have both emitters in one lantern.

Zulumoose
Zulumoose's picture
Offline
Last seen: 3 months 3 weeks ago
Joined: 04/13/2017 - 09:25
Posts: 859
Location: South Africa

Forget the lanterns, I want whatever the hell those brassy, steam-punky things are in the middle, they look awesome.

Beam me up!

Madtoffel
Offline
Last seen: 1 month 1 day ago
Joined: 05/07/2018 - 09:46
Posts: 94
Location: Germany (TLF member)

This looks amazing! Using the Samsung LEDs was/is definitely the right choice.

ToyKeeper
ToyKeeper's picture
Offline
Last seen: 3 days 17 hours ago
Joined: 01/12/2013 - 14:40
Posts: 10654
Location: (469219) 2016 HO3
Zulumoose wrote:
Forget the lanterns, I want whatever the hell those brassy, steam-punky things are in the middle, they look awesome.

Read DBSAR’s custom build threads to find out how to make those.

adam7027
Offline
Last seen: 1 day 1 hour ago
Joined: 09/26/2017 - 13:54
Posts: 666
Location: EU (Hu)

I am already amazed at the maturity of this project, as every details are chosen carefully and tested thorougly.

If tint changing feature will be introduced to this lantern, that would be awesome. But I think, tint mixing between two CCT far from each other would be less great. Personally, I would go with something like mixing between 3000K and 4500K, or 2700K and 4000K. The difference between 2700K and 5000K is rather high – that difference would be maybe acceptable with Optisolis grade emitters, but with “only” ~90-92 CRI, it will not yield, what we would expect – and for some people (including maybe me as well), tint will go off to the rosy side too much in between.

Also, if a lantern is further imagined, I use a very expectional emitter in one of my Skilhunt H03 headlamps (or to be exact, four of them) – the 2000K Nichia E21A – which would be a treat for any kind of lanterns. It is very cozy ultra warm, with deep reds I have never seen elsewhere in a white (broad spectrum) LED – might worth a separate field test on its own.

ToyKeeper
ToyKeeper's picture
Offline
Last seen: 3 days 17 hours ago
Joined: 01/12/2013 - 14:40
Posts: 10654
Location: (469219) 2016 HO3

If it helps at all, a few of us on the forum have done tint-mixing experiments in the past. I’ve found that a wide-spectrum light actually looks better than a high-CRI single-CCT light. I have one which emits everything from 3000K to 6500K and it really makes colors pop. It’s more vivid than regular lighting, almost as if someone took a picture and applied a “vivid colors” effect to make everything look nicer.

I also make a habit of mixing 2700K or 3000K bulbs with 5000K bulbs in bathrooms, because it makes putting makeup on quite a bit easier. With any single tint, it’s hard to discern subtle color differences, and what looks fine in the mirror may look horrid in different lighting… but with a mixed tint those subtle differences stand out and are easy to correct before going outside.

If anything, instead of regular 4000K emitters, I’d rather have 4000K produced by a mixture of 3000K+5000K. In my experience, it’s an upgrade.

vinte77
Offline
Last seen: 3 months 3 weeks ago
Joined: 03/04/2014 - 18:43
Posts: 766
Location: California

I’m #46 on the list, but I’d be interested in another 2 lanterns.

DBSAR
DBSAR's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada
Zulumoose wrote:
Forget the lanterns, I want whatever the hell those brassy, steam-punky things are in the middle, they look awesome.

Both are custom built flashlights from the 2nd and 3rd Annual BLF / Old Lumens scratch made contests. http://budgetlightforum.com/node/30014 , and http://budgetlightforum.com/node/42279

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Zulumoose
Zulumoose's picture
Offline
Last seen: 3 months 3 weeks ago
Joined: 04/13/2017 - 09:25
Posts: 859
Location: South Africa
DBSAR wrote:
Zulumoose wrote:
Forget the lanterns, I want whatever the hell those brassy, steam-punky things are in the middle, they look awesome.

Both are custom built flashlights from the 2nd and 3rd Annual BLF / Old Lumens scratch made contests. http://budgetlightforum.com/node/30014 , and http://budgetlightforum.com/node/42279

All I can find is “photo not found, click for photos” with a cat background. Clicking doesn’t do anything. Photobucket?

Beam me up!

DBSAR
DBSAR's picture
Offline
Last seen: 3 weeks 1 day ago
Joined: 02/11/2013 - 23:28
Posts: 6348
Location: Newfoundland, Canada
Zulumoose wrote:
DBSAR wrote:
Zulumoose wrote:
Forget the lanterns, I want whatever the hell those brassy, steam-punky things are in the middle, they look awesome.

Both are custom built flashlights from the 2nd and 3rd Annual BLF / Old Lumens scratch made contests. http://budgetlightforum.com/node/30014 , and http://budgetlightforum.com/node/42279

All I can find is “photo not found, click for photos” with a cat background. Clicking doesn’t do anything. Photobucket?

i just realized that those topics were before photobucket tried to charge users a large fee to access their photos there, i closed my account after that. i will need to upload them all again to imgur to fix it.

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

lohtse
lohtse's picture
Offline
Last seen: 5 months 4 days ago
Joined: 05/19/2017 - 04:18
Posts: 328
Location: UK

I think will have to have three now!!!!!!!!(was two) so add another please..

thank you

Problemes d'erection [url=https://www.viagrasansordonnancefr.com/]viagrasansordonnancefr.com[/url] meilleure pharmacie

Texas_Ace
Texas_Ace's picture
Offline
Last seen: 23 hours 38 min ago
Joined: 03/24/2016 - 07:44
Posts: 9263
Location: Everything is brighter in Texas

ToyKeeper wrote:
If it helps at all, a few of us on the forum have done tint-mixing experiments in the past. I’ve found that a wide-spectrum light actually looks better than a high-CRI single-CCT light. I have one which emits everything from 3000K to 6500K and it really makes colors pop. It’s more vivid than regular lighting, almost as if someone took a picture and applied a “vivid colors” effect to make everything look nicer.

I also make a habit of mixing 2700K or 3000K bulbs with 5000K bulbs in bathrooms, because it makes putting makeup on quite a bit easier. With any single tint, it’s hard to discern subtle color differences, and what looks fine in the mirror may look horrid in different lighting… but with a mixed tint those subtle differences stand out and are easy to correct before going outside.

If anything, instead of regular 4000K emitters, I’d rather have 4000K produced by a mixture of 3000K+5000K. In my experience, it’s an upgrade.

Ditto this, my EDC for the last 1.5 years has been a mixed tint triple with 3000k and 5700k 90CRI LED’s and the only LED I have used yet that is nicer is the 219B 9080 but it only does about half the lumens, so I stick with what I have.

sleasys14
Offline
Last seen: 17 hours 30 min ago
Joined: 05/11/2018 - 16:23
Posts: 60
Location: charleston wv

Interested in 1

qandeel
Offline
Last seen: 4 hours 30 min ago
Joined: 11/23/2011 - 15:11
Posts: 552
Location: عُمَانْ

add me for 2 more for a total of 3. Thanks

 عُمَانْ

Madtoffel
Offline
Last seen: 1 month 1 day ago
Joined: 05/07/2018 - 09:46
Posts: 94
Location: Germany (TLF member)

A few days ago I said in post 1704 that I want a second one, but I just checked the list and could find my name only once (703). Could you please check that?

puglife2
puglife2's picture
Offline
Last seen: 1 day 11 hours ago
Joined: 10/07/2017 - 17:56
Posts: 321

Im in !!!!!!!!!!!!!

severide
Offline
Last seen: 1 year 1 month ago
Joined: 06/01/2018 - 15:16
Posts: 117
Location: United States

Alright alright, put me down for 2 more (total 4) please.

anycolourfloyd
Offline
Last seen: 1 year 8 months ago
Joined: 09/06/2017 - 03:35
Posts: 98
Location: South Australia

Do we have a rough price estimate yet, and approx duration to manufacture? Or is it still too early to tell

sbslider
sbslider's picture
Offline
Last seen: 3 days 11 hours ago
Joined: 01/22/2017 - 13:41
Posts: 1648
Location: United States

Ok, I have been out of touch a few days and am catching up.

dekozn wrote:
I’m all in for 2700K

dekozn, you are currently number 363 on the interest list, are you looking for a second lantern, or just lobbying for 2700K emitters?

atbglenn wrote:
Interested

lantern interest list number 879 reserved for atbglenn

vinte77 wrote:
I’m #46 on the list, but I’d be interested in another 2 lanterns.

I did not double check the OP vinte77, but I see you as having number 46 and 214 already. I added two more anyway at numbers

lohtse wrote:
I think will have to have three now!!!!!!!!(was two) so add another please..

thank you

Added your third lohtse at 882 on the interest list.

sleasys14 wrote:
Interested in 1

sleasys14 added at number 883 on the interest list

qandeel wrote:
add me for 2 more for a total of 3. Thanks

qandeel added two more at numbers 884 and 885 on interest list

Madtoffel wrote:
A few days ago I said in post 1704 that I want a second one, but I just checked the list and could find my name only once (703). Could you please check that?

I show you with two lights, number 714 and 853 on the interest list. The OP has not been updated very recently, but you can see the online version of the interest lists at the links below.
interest list sorted by entry number

interest list sorted by user names

puglife2 wrote:
Im in !!!!!!!!!!!!!

Indeed puglife2, you are number 886 on the interest list

severide wrote:
Alright alright, put me down for 2 more (total 4) please.

Done severide, two additional lanterns are 887 and 888 on the interest list.

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

Pages