Making my own LT1M from an IF25

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Nismo
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Making my own LT1M from an IF25

So I’ve been dying to get myself a smaller version of the LT1 since I got mine in December.
Don’t get me wrong, the LT1 is absolutely amazing, however when I’m packing lightweight for an overnight camping trip, it takes up too much space and weight.

So I went at it last night and looked at the ideas from DBSAR himself:

Looking through my inventory I found some canisters bought from eBay, and they were the perfect size.

Then I started experimenting while using some info that DBSAR had found out.
For example the mirror in the top reflecting down to increase light output and reduce glare.

First revision, added electrical tape to hide the ugly glue marks from gluing the container cap up in the container itself. The cap also acts as a first diffuser:

Kitchen testing, ~25% brightness @2700K. Looks great!

Living room testing, 100% brightness and lowered ISO on the camera to prevent overexposure.

It’s plenty bright, but it gets hot and ramps down in this state.

Designed and printed a cap and bottom for it, and glued them on. Here it is compared to the LT1.

The diffuser is tightly press-fit onto the top of the IF25, so no modification of the light required and it’s still water resistant.
The original lanyard makes it hangable in the tent, or outdoors in a tree. I didn’t want to hang it from the diffuser in case the press-fit wasn’t tight enough, but it’s plenty tight (for now).

Tint ramping!

I hope this is inspiring to others, and it is by no means a competitor to DBSAR’s project.
His final one will be miles better than this one with better LEDs, better looking finish, higher quality etc.
I’m still buying two of his LT1M whenever they’re available Smile

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

Edited by: Nismo on 07/26/2020 - 14:40
Anthony Nguyenn
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Great job Nismo. Thank you for sharing. Beer
Can I have the measurement of the container/diffuser please ? Also, do you still add thi mirror to the cap after 3D print?

Lumintop Tool AA 2.0 Nichia + CW| Lumintop Tool AAA | Lumintop EDC 18 6500k| Lumintop EDC 01| Convoy S2+ 7135*8 5000k | Convoy S2 UV Nichia |Massdrop Vega AA NW |BLF A6 NW | Nitecore Tube 2.0 | Sofirn SD 05 | Sofirn 01S 4000k| Klaurus G15 | Klarus HR1 Pro | Thrunite T10T v2 NW| Thrunite T1 Black + OD Green | Thrunite Ti3 CW+ NW| |Rovyvon A3x Nichia | Rovyvon A5x Cree | Rovyvon A23 Nichia | Wuben E19 Nichia | MecArmy SGN 6 | Wowtac BSS V4 | Wowtac W1 | Wowtac H01 | Ultratac A3N Nichia | Wurkkos FC11 |  Wurkkos WK30

Thrunite T2 |

SammysHP
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Very nice! Seems to be a handy size and the tint ramping as a bonus. Some different approaches compared to my Yogurt Lantern.

I have some prototypes using this kind of container. With mirror, without mirror, with plastic tube in the center, with various cones. I think I’ll start experimenting with them again.

Nismo
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Anthony Nguyenn wrote:
Great job Nismo. Thank you for sharing. Beer Can I have the measurement of the container/diffuser please ? Also, do you still add thi mirror to the cap after 3D print?

Thanks! Here are the measurements of the container. It’s a standard 60ml container from eBay. Here’s an example, however I’m not 100% sure it has the same measurements.

The mirror is in there even with the 3D printed cap, I used the small inner-cap that the bottle came with, as you can see on the first picture:

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

Nismo
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SammysHP wrote:
Very nice! Seems to be a handy size and the tint ramping as a bonus. Some different approaches compared to my Yogurt Lantern.

I have some prototypes using this kind of container. With mirror, without mirror, with plastic tube in the center, with various cones. I think I’ll start experimenting with them again.

Thank you! I saw your yogurt lantern and it inspired me to try different plastic containers as diffusers back then.

It’s fun to experiment and see the different results, milky white diffusers are at least better than most commercial LED lanterns available that don’t have any.
I dislike the harsh lighting from clear LED lanterns.

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

SammysHP
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Nismo wrote:

I dislike the harsh lighting from clear LED lanterns.

Absolutely! One important factor with glare and softness of the light is the area. Bigger area helps a lot.

Would be interesting to try these anti-glare filters used in office lights. Are they available as flexible sheets?

edit: Some info about these anti-glare films: https://www.brightviewtechnologies.com/products/light-management/glare-c...
Everything together decreases the efficiency a lot, with mirrors, internal diffuser and anti-glare film maybe >30-40%?

SammysHP
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Today I’ve played a little bit with OpenSCAD. Here’s my idea of a lantern using this kind of container. Not sure how I will finish/coat the “reflector” part. I’m thinking of something like satin white.

You have to cut off both the bottom and top part of the container, drill eight holes in the remaining tube and clip it into the printed parts. Every dimension is fully parametric (but due to some laziness and experimentation the code is ugly).

Anyway, here’s the code: https://cloud.finf.uni-hannover.de/s/dppxRCDEBwNFy7c

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Nice job on this Nismo! Thumbs Up

That Canadian flashlight guy & Lantern Guru -Den / DBSARlight