[1900k edition is in!] WTS: 1900k-5800k 5mm LED 95+ CRI

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Jerommel
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DBSAR
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PM sent! i am interested in a pack of the 2300K and a pack of the 3400K for mini lantern mods & builds. Big Smile

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

rngwn
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And with that, the 2300k is out (except one reserved for Skylight)

Will let you know if the supplier got any left.

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New list of T/Ns

iamlucky13 – (1× 2300k / 1× 3400k)
candor – (1× 2300k / 1× 5800k)
Agro – (2× 2300k)
nastynate – (1× 2300k)
Jerommel – (1× 2300k / 1× 3400k)
DBSAR – (1× 2300k / 1× 3400k)

Asian8640 – (1× 2300k / 1× 3400k)
mitsuki08 – (1× 2300k / 1× 5800k)
nismo – (2× 2300k)

Djozz – (????????)
skinny_tie – (1× 2300k / 1× 3400k / 1× 5800k)
nismo – (1× 3400k, 1× 5800k)

Scientist – (1× 2300k)
Buck91 – (1× 3400k)
DBSAR – (4× 3400k / 2× 2300k)
datiLED – (1× 3400k / 1× 5800k)

u/somnambulism (1× 2300k / 1× 3400k / 1× 5800k)
Skylight – (1× 2300k / 2× 3400k / 1× 5800k)
Slayer1 – (1× 2300k)

Agro
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iamlucky13 wrote:
Regarding driving LED’s in parallel, I think we can make some basic deductions from djozz’s data:
http://budgetlightforum.com/comment/1565398#comment-1565398

If you’re driving 10 at 350mA, that’s 35mA each.

From djozz’s graph, that’s about 2.95V.

If you had one LED in the group with a Vf that was lower and therefore hogging the current, then from the same data, I’d estimate the resulting current in the worst-driven LED as follows:

0.1V lower = 55mA
0.2V lower = 70mA

Since one of his survived an isolated test for 12 hours at 100mA, the over-current does not seem to be a problem. However, rngwn observed that if packed together, they heat up and may eventually run away:
http://budgetlightforum.com/comment/1570465#comment-1570465

So for the idea of running 10 on a 7135, I think heat is the main concern.


Note that the LED with the lowest Vf will get hotter than the others. Which will lower its Vf further.
I don’t know if this is the case here but sometimes it spirals out of control.
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So I did some more replacing of LEDs, this time in my new Sangean MMR-88 DAB emergency radio. The original LEDs were 3mm 6500K ones, changed them out for the 5mm 2300K LEDs. Had to drill up the reflector but that was pretty easy as it was just plastic. The PCB for the lights were modular and unpluggable, so the job was pretty easy. Overall I think it turned out well, brightness isn’t the greatest obviously, but it was pretty terrible with the original LEDs so it didn’t matter much.

Beam profile and color temperature of the new LEDs, camera @5000K

Unfortunately I don’t have a picture of the old beam profile, but here’s one of the original LEDs. Camera @5000K

The light itself on low brightness. It has four modes; high, low, flashing and SOS. When the radio is off, it’s just high and off unfortunately. Should’ve been low, high and SOS.

Time to change all 5mm LEDs I can find!

Current lights:

Emisar D4V2 SST-20 4000K, D4V2 Ti SST-20 2700K, D4V2 Ti SST-20 4000K, D4V2 Ti XPL-Hi V3 1A, D4SV2 SST-20 3000K Noctigon KR1 OSRAM W2, K9.3 XPL-Hi V3 3A + SST-20 2700K | Fireflies PL47G2 XPL HI V3 3A, PL47G2 SST-20 4000K, E07 219B 4500K Lumintop FW1A SST-20 4000K, Tool AA 2.0 Nitecore LR12 XP-L HD V6 6500K, TUP XP-L HD V6 6500K | Sofirn C01S SST-20 4000K, SP10S LH351D 5000K, IF25/LT1-M SST-20 2700K + 6500K w/3D printed diffuser, BLF SP36 LH351D 5000K, BLF LT1 | ZebraLight SC700d XHP 70.2 5000K Hi-CRI, SC53Fc XP-L2 4000K Convoy C8+ SST-40 6500K Acebeam H30 XHP 70.2 5000K | Manker E14 III LH351D 6500K

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Agro wrote:

Note that the LED with the lowest Vf will get hotter than the others. Which will lower its Vf further.
I don’t know if this is the case here but sometimes it spirals out of control.

So, in conclusion: Current should be chosen below specs, serial circuit would be ok with booster and FET to control current. I guess if those three 10-LED-arrays will do 50lm each or even less, this would be more than enough anyway.

I see if I can use 3mm aluminum sheet and drill some holes.

Smile, you cannot kill them all.

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I have a couple project lights I have run a bunch of the 3400K in parallel.

One is a 36 LED desk lamp with 3S 12P, running each at about 30mA. For this application I want it to be able to run many hours at a time and last for a long time. 30mA should do that. Looking at them with dark sunglasses Cool They appear to be driven very evenly.

The other light is one of those cheap drugstore 3AAA lights with 6 LEDs. I was able to find room on the board to drive them with a 7135, so that comes to about 58mA each. They get a bit warm after 15 minutes or so but also appear to be driven very evenly, all the same illumination to my eyes. This was a useless junk drawer light until these LED’s were installed. An 18500 fits well in there with a spacer to take up the extra diameter.

Beautiful light quality on both of these; warm floodlight.

Also a special thanks to Djozz for providing the test data on these. I have referred to it many times.

rngwn
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Good news,

My supplier still has a plenty of 2300k left and I’m about to snag 2000 pcs (40 pks equiv.) for 2300k and 3400k each.

Jerommel
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rngwn wrote:
Good news,

My supplier still has a plenty of 2300k left and I’m about to snag 2000 pcs (40 pks equiv.) for 2300k and 3400k each.


Wow..
Are you sure you will find buyers for 4000 LEDs?
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Jerommel wrote:
rngwn wrote:
Good news,

My supplier still has a plenty of 2300k left and I’m about to snag 2000 pcs (40 pks equiv.) for 2300k and 3400k each.


Wow..
Are you sure you will find buyers for 4000 LEDs?

I just want to make sure that it lasts through new year festival and Chinese new year (since the factories will be closed for quite a long time). If it runs out of stock during this period, then I won’t be able to replenish it.

Jerommel
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rngwn wrote:
Jerommel wrote:
rngwn wrote:
Good news,

My supplier still has a plenty of 2300k left and I’m about to snag 2000 pcs (40 pks equiv.) for 2300k and 3400k each.


Wow..
Are you sure you will find buyers for 4000 LEDs?

I just want to make sure that it lasts through new year festival and Chinese new year (since the factories will be closed for quite a long time). If it runs out of stock during this period, then I won’t be able to replenish it.


I may buy one of those 100 LED UV lights in the picture a few posts back, and then i’ll need 2 more packs of your LEDs. Smile
rngwn
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Okay guys. 2300k has been restocked.

iamlucky13
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Is there a known site to track these numbers? 17track.net does not seem to be able to find them.

Looking forward to trying out the 2300K. Thanks!

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iamlucky13 wrote:
Is there a known site to track these numbers? 17track.net does not seem to be able to find them.

Looking forward to trying out the 2300K. Thanks!

Just put these on USPS website (for U.S. customers) or https://track.thailandpost.co.th/

The registered/ePacket should be trackable by destination country’s postal service. (That doesn’t apply for packages beginning with ‘U’ though since it’s explicitly non-trackable.)

Thailandpost has just changed API and that messes up 17track’s.

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Thanks! That clears it up. Both USPS and Thailand Post work.

Nismo
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Another mod, this time a cheap $3 headlamp that I’ve had for years, but never really used regularly due to the light being poor.
This was before I knew about the proper good flashlights and headlamps, and only went to the local hardware store for lights.

It has four 5mm cold white spot beam LEDs and three 3mm red LEDs. Low brightness setting turns on the middle two LEDs, high brightness setting turns on all of them. It takes 3x AAA batteries and has a decent runtime.

Original tint and beam:

PCB with new LEDs, the two in the middle are 2300K and the outer ones are 3400K. This means that on the “low” brightness the light is pretty warm, while on the “high” brightness it gets mixed to a lovely tint of around 2700K with more flood and brightness. Red LEDs are still the same.

Beam profile with the middle 2300K LEDs. Camera @5000K:

Beam profile with all the LEDs, 2300K + 3400K. Camera @5000K:

Beam profile of the red LEDs. Camera @5000K:

Indoor beam shot of the two 2300K, dark wooden hallway with white doors and door frame. Camera @5000K:

Indoor beam shot of the two 2300K and two 3400K. Camera @5000K:

Indoor beam shot of the red LEDs. Camera @5000K:

The headlamp itself, it can be angled and it’s pretty great to wear for the price.

So the LEDs made this cheap light into something I’d actually use more now that the light is a lot better.
It’s perfect for indoor use, as it’s pretty floody and easy on the eyes due to the warm tint. Perfect for reading a book in a tent for example.

I’m most likely going to be hunting these cheap 5mm headlamps and see which has the best UI and modability if that’s a word.
I’ve found a cheap $10 one with a 3W CREE XP-E R3 main LED with a clear reflector and two 5mm LEDs on the sides. That makes for a nice dual-purpose headlamp since the CREE LED will throw decently with 150 lumen, while the two 5mm LEDs can be swapped for either 2300K or 3400K for warm white indoor light. It’s also 3xAAA.

I absolutely love these LEDs, thank you so much for discovering these, rngwn.

Current lights:

Emisar D4V2 SST-20 4000K, D4V2 Ti SST-20 2700K, D4V2 Ti SST-20 4000K, D4V2 Ti XPL-Hi V3 1A, D4SV2 SST-20 3000K Noctigon KR1 OSRAM W2, K9.3 XPL-Hi V3 3A + SST-20 2700K | Fireflies PL47G2 XPL HI V3 3A, PL47G2 SST-20 4000K, E07 219B 4500K Lumintop FW1A SST-20 4000K, Tool AA 2.0 Nitecore LR12 XP-L HD V6 6500K, TUP XP-L HD V6 6500K | Sofirn C01S SST-20 4000K, SP10S LH351D 5000K, IF25/LT1-M SST-20 2700K + 6500K w/3D printed diffuser, BLF SP36 LH351D 5000K, BLF LT1 | ZebraLight SC700d XHP 70.2 5000K Hi-CRI, SC53Fc XP-L2 4000K Convoy C8+ SST-40 6500K Acebeam H30 XHP 70.2 5000K | Manker E14 III LH351D 6500K

Asian8640
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Hi. I don’t want to sound like “that guy”, but I don’t think that providing tracking numbers in a public place can be filed under good safety practices. I know it’d be a bit more work, but providing tracking numbers in a private environment (like personal messages) would be safer for those that don’t want their place of residence revealed.

Jerommel
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^ that guy has a point.

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My package has arrived. Smile

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I guess I got a solution:

Tracking will now be given on the paypal receipt instead, which I have noticed it allows me to fill in the T/N.

Asian8640
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rngwn wrote:
I guess I got a solution:

Tracking will now be given on the paypal receipt instead, which I have noticed it allows me to fill in the T/N.

Thank You for your discretion. I REALLY look forward to those 2300k LED’s. I’ve been looking for something like that for quite a while.

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Even more modding, now the $10 headlamp I was talking about. This one has become my favorite multi-purpose headlamp, even though I have brighter ones (PL47G2 for example).

Original specs:

- 3W CREE XP-E R3 main LED w/clear reflector, around 5500K tint
- 2× 5mm white flood LEDs, around 6000K tint
- UI with 7 modes: Main bright, main dim, main blinking, flood on (main off), flood SOS, off. Hold for off in any mode.
- Tilting head, around 45 degrees downwards.
- 3xAAA batteries.

The headlamp (with 2300K modded flood LEDs)

Main LED beam & tint. Pretty tight beam and it has plenty throw. All the beam shots are a meter from the wall. Camera @5000K:

Original ~6000K flood LED beam & tint. Camera @5000K:

Modded 2300K flood LED beam & tint. Camera @5000K:

Original vs modded headlamp. Camera @5000K:

Pretty satisfied with this one, I’ve used the main light outdoors and it throws pretty far for a cheap headlamp. The flood LEDs are great for indoor use with the warm tint. I’m going to do a few of these and give them away to friends and family. People seem to be amazed by proper warm white LEDs because they’re so rare.

Current lights:

Emisar D4V2 SST-20 4000K, D4V2 Ti SST-20 2700K, D4V2 Ti SST-20 4000K, D4V2 Ti XPL-Hi V3 1A, D4SV2 SST-20 3000K Noctigon KR1 OSRAM W2, K9.3 XPL-Hi V3 3A + SST-20 2700K | Fireflies PL47G2 XPL HI V3 3A, PL47G2 SST-20 4000K, E07 219B 4500K Lumintop FW1A SST-20 4000K, Tool AA 2.0 Nitecore LR12 XP-L HD V6 6500K, TUP XP-L HD V6 6500K | Sofirn C01S SST-20 4000K, SP10S LH351D 5000K, IF25/LT1-M SST-20 2700K + 6500K w/3D printed diffuser, BLF SP36 LH351D 5000K, BLF LT1 | ZebraLight SC700d XHP 70.2 5000K Hi-CRI, SC53Fc XP-L2 4000K Convoy C8+ SST-40 6500K Acebeam H30 XHP 70.2 5000K | Manker E14 III LH351D 6500K

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Bonus mod, 11-LED hurricane lantern with dimmer. Made out of metal and glass.
It’s using 2x D-batteries which makes for great battery life.
Original LEDs are supposedly warm white, modded LEDs are 2300K.

Original tint, quite cold for a light that’s advertised as “warm white”. Looks green-ish. Camera @4200K:

Modded tint with 2300K LEDs. Camera @4200K:

Added frosted glass for a more even light spread, looks much nicer.

It’s just for decoration purposes, but it works to light up a room in case of a power outage. Pulls 17mA at 3V on the lowest brightness, 320mA at 3V on full brightness. Sorry if these mods are tedious, I hope they bring some inspiration for the LEDs.

Current lights:

Emisar D4V2 SST-20 4000K, D4V2 Ti SST-20 2700K, D4V2 Ti SST-20 4000K, D4V2 Ti XPL-Hi V3 1A, D4SV2 SST-20 3000K Noctigon KR1 OSRAM W2, K9.3 XPL-Hi V3 3A + SST-20 2700K | Fireflies PL47G2 XPL HI V3 3A, PL47G2 SST-20 4000K, E07 219B 4500K Lumintop FW1A SST-20 4000K, Tool AA 2.0 Nitecore LR12 XP-L HD V6 6500K, TUP XP-L HD V6 6500K | Sofirn C01S SST-20 4000K, SP10S LH351D 5000K, IF25/LT1-M SST-20 2700K + 6500K w/3D printed diffuser, BLF SP36 LH351D 5000K, BLF LT1 | ZebraLight SC700d XHP 70.2 5000K Hi-CRI, SC53Fc XP-L2 4000K Convoy C8+ SST-40 6500K Acebeam H30 XHP 70.2 5000K | Manker E14 III LH351D 6500K

djozz
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Keep them coming Smile

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Is that lantern something that is currently available?

Actually, after seeing DBSAR’s collection, I’m thinking of getting an actual kerosene lantern of my own for use around my fire pit, but why not both?

And if anybody knows of an LED candle that isn’t difficult to mod, but will retain its flicker with an LED swap, I’m also interested.

My wife’s current candles all have amber LED’s. One type is easy to mod, but the flicker is built into the LED itself. The other type has actual wax molded around a plastic base and can’t be disassembled without destroying the wax.

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rngwn wrote:
I guess I got a solution:

Tracking will now be given on the paypal receipt instead, which I have noticed it allows me to fill in the T/N.

Thanks. I received an email from Paypal this morning reporting the invoice has been updated with tracking info.

Scientist
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Yes Nismo I love seeing new ideas. And I just got my own bag to try my hand at a few.

Please illuminate responsibly
Part time fragmented conciousness technician

UV triple using Sofirn C8F
395nm High Power LED in Sofirn SC31b

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i received some today! i like these a lot. Thumbs Up

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight

Jerommel
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I’ve got 2 of these:

28 LEDs
With a modified tail switch it can now both tail stand and fit an 18650 (unprotected though).

And one of these on the way:


21 LEDs

Should i get one of these too?

LOL

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