Light diffuser material from Luminit

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RobertB
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Light diffuser material from Luminit

I’m subscribed to LED magazine and found this product mentioned. Diffuser film by a company called Luminit and as you can see from their website, they do a lot more than diffuser films.

They sent me a sample. The filter is quite opaque and reminds me of Zebralight diffused lens. Luminit claims “LSDs will achieve between 85% and 92% transmission efficiency”. The thickness of the film is .25mm.

I’d be happy to cut out a small square for anyone who wants to try it. If the feedback is positive, I could possibly buy a few large sheets to cut up into squares and mail out. I have no idea what the pricing is on these sheets, and I’d rather not have people here bombard them with sample requests. The sample looks promising to me. It turns this Acebeam EC 50 into a wall of light.

Here is a few pictures using an Acebeam EC50 GEN II flashlight.

Without film

With film sitting on top of the lens

Zebralight example

Beam without film

Beam with film

Film sample

LightRider
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How does it compare to DC fix? Does it come in different diffusing angles? I may be interested a sample…

RobertB
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LightRider wrote:
How does it compare to DC fix? Does it come in different diffusing angles? I may be interested a sample…

I’ve never used DC fix, but this comes in many diffusing angles. This particular one is a 40 degree circular. They make them .5 degrees up to 100 degrees. They also make elliptical diffusers such as 60° x 10°

Circular: 0.5° to 100°
Elliptical: minor: 1° to 60° ; major: 10° to 80°

Light transmission efficiency
Circular: 0.2° to 20° ≥ 90% – 20° to 80° ≥ 85%
Elliptical ≥ 85%

everydaysurvivalgear
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Thanks mate this stuff looks cool. It must be better then using an old milk bottle lol.

blueb8llz
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Looks like very good stuff. But how does it stick on?

Paul321
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That would work great for a headlamp , er a headlamp with a reflector that is.

Paul-

RobertB
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blueb8llz wrote:
Looks like very good stuff. But how does it stick on?

It’s a plastic sheet .25mm (.011”) thick. I pulled off the bezel and stuck it on top of the lens, and put the bezel back on. I’m talking to the sales engineer tomorrow morning, and one of my questions is if there is a “cling” type film available. This company makes all kinds of diffusers, lenses, and holographic films for heads up displays, etc..

RobertB
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Paul321 wrote:
That would work great for a headlamp , er a headlamp with a reflector that is.

very similar to the Zebralight diffuser like in this H600Fd MK III headlamp

RobertB
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Check out how diffused this Acebeam EC50 is in my back yard.

DayLighter
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Whoa.. cool stuff, hmm imagine if I put it on my TR-J18 with monster driver, extreme flood:D

The only way to do a great work is to love what you do.

stephenk
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Thanks for the heads up!

brad
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I would love a sample for my headlamps, that is where it really matters to me.

mud_muncher
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How do you get all your grass to grow white like that? Is it because of the diffuser? LOL

RobertB
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brad wrote:
I would love a sample for my headlamps, that is where it really matters to me.

What headlamp do you have that you can get the bezel and lens apart?

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Robert, would you be willing to send me a couple square inches of the Luminit film?

I’ve got d-c-fix on some lights and would love to compare it to this stuff. I can post some comparison photos.

I use a vinyl cutter and the computer to cut perfectly sized circles. It will cut up to 0.8mm material so it should work with the Luminit film.

If you let me know what sizes you need I can send you some circles of d-c-fix, maximum 3-1/2” diameter.

RobertB
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goshdogit wrote:
Robert, would you be willing to send me a couple square inches of the Luminit film?

I’ve got d-c-fix on some lights and would love to compare it to this stuff. I can post some comparison photos.

I use a vinyl cutter and the computer to cut perfectly sized circles. It will cut up to 0.8mm material so it should work with the Luminit film.

If you let me know what sizes you need I can send you some circles of d-c-fix, maximum 3-1/2” diameter.

I can send you a 1.75 × 2.25 piece. Will that work? You have to promise to post your “before and after” results here. Deal?

Thanks for the DC fix offer, but I’m fine with this. If I end up buying a bunch of sheets of this, I might hit you up to cut them. Had a nice discussion with the engineer today, and waiting on pricing. Hopefully it won’t be too horribly expensive. The full sheets are 22” x 22”. The way he explained it to me is, these are holographic 2 layer sheets.

PM me your address

goshdogit
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RobertB wrote:
You have to promise to post your “before and after” results here. Deal?
Deal! PM sent. Thumbs Up
LightRider
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Thanks for the sample! It arrived today. The holographic nature is interesting.. I put it up to just a couple lights to test, but It is far superior to dcfix at first glance. Very smooth and very efficient. It’s pushing me on to get my butt moving on a long outstanding RGBW build i e been working on. Any response to your pricing requests?

RobertB
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LightRider wrote:
Thanks for the sample! It arrived today. The holographic nature is interesting.. I put it up to just a couple lights to test, but It is far superior to dcfix at first glance. Very smooth and very efficient. It’s pushing me on to get my butt moving on a long outstanding RGBW build i e been working on. Any response to your pricing requests?

I emailed him this morning, but haven’t heard anything yet. Trying to get a few more samples of the 10,20, and 30° film diffusers. He was supposed to email me pricing today. Going to call him tomorrow.

Was hoping to get this figured out before going on vacation. Feb 9th thru the 19th. Scott (goshdogit) just received a sample and is going to see if he can cut the film on a vinyl cutter.

blueb8llz
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LightRider wrote:
Thanks for the sample! It arrived today. The holographic nature is interesting.. I put it up to just a couple lights to test, but It is far superior to dcfix at first glance. Very smooth and very efficient. It’s pushing me on to get my butt moving on a long outstanding RGBW build i e been working on. Any response to your pricing requests?

do you have a lux tester? im curious to know which diffuser eats up more of the lumens.

goshdogit
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Robert generously sent me a sample of Luminit 40-degree film.

The vinyl cutter was able to cut it, but I’ll need to tweak the settings when more film is available.

The 2-1/4” x 1-5/8” sample was just enough to make inserts for four lights.

Here’s an A01, EE X6, S2+ triple, and BLF 348 with Luminit placed behind their lenses.

Perhaps not the first choice of lights for using the film, but most BLF’ers are familiar enough with them to provide a good comparison.

I’ll post beamshots comparing un-modified, d-c-fix, and Luminit in the next couple days.

goshdogit
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I’d like to share some beamshots comparing d-c-fix and Luminit 40° film on an EagleEye X6 and a Convoy S2+ triple.

EE X6 is running an MTN17DD-m driver and Nichia 219C emitter.

S2+ triple is running a BLF A6 driver, Nichia 219BT emitters, and Carclo 10507 “narrow spot” optic.

Both lights are running freshly-charged HG2 cells. All photos are taken with the lights at maximum output.

Lights are mounted 38” (96.5 cm) off the ground. The camera is positioned 8” (20 cm) above the lights.

Lights are aimed at the tree in the center of the frame, which is 92 feet (28 meters) away.

Photos were taken about 1.5 hours after sunset.

I’ve included 2-frame comparison .GIFs excluding the d-c-fix photo for folks who have no experience with d-c-fix.

Click a .GIF for a larger view.

EagleEye X6 (three frames)
unmodified vs. d-c-fix vs. Luminit 40° film:

EagleEye X6 (two frames)
unmodified vs. Luminit 40° film:

Convoy S2+ (three frames)
unmodified vs. d-c-fix vs. Luminit 40° film:

Convoy S2+ (two frames)
unmodified vs. Luminit 40° film:

The photoshoot was supervised by a great horned owl, perched high in a tree just over my right shoulder. Yes, really! Smile

The Burgh
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Terrific comparative photos! Thanks for those!

Now wondering how the different angles of Luminit would affect the beam.

There will always be more darkness than I have lights.

Ginseng
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Robert,
I would be interested in trying some of this material. I first encountered circular holographic diffusers in the flip-up filters for my SureFire lights but those are long gone. Since I very much value highly uniform light for my near-range use, this would be of value to me. Do you anticipate ordering more sheets for splitting? I don’t want to take your stuff if you have more concrete plans.
Wilkey

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Likewise. I’d be happy to pay for a few sheets, pending price info, of course. Thanks for sharing.

People say I’m a flashaholic like it’s a bad thing…

JamesB
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Quick slap some on generic chinese flashlight and sell it for 600% markup at CPF.

Oh wait someone already done it.

http://budgetlightforum.com/node/32195

RobertB
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Goshdogit, awesome comparisons thanks for posting those. I will be back from vacation on the 19th.

A few more samples are being sent to me right now, 10, 20 & 30 degree circular film.

There are also lenses available in the shape of a 20 × 20 inch panels 1.45mm thick, which is the thickness convoy uses on the S2+. Pretty sure the C8 is the same thickness. They have to be cut with a cnc machine or something that won’t burn or melt the polycarbonate. The bad news is, these holographic panels cost $300. The good news is, 1 panel would yield approx. 500 lenses at 20.43mm (S2+) in diameter. Luminit has offered to custom cut an entire panel, but I don’t know if that includes cleaning, and packaging them in tiny ziplock bags.

The .25mm (.11inch) holographic film panels cost $150, and again would yield approx 500 S2+ size filters.

The beauty of the film is, if you can remove the bezel, then you can take the filter on and off with ease. On the S2+, I’ve been putting the filter inbetween the reflector and the glass lens. On the larger Acebeam EC50, the bezel comes off easy, and I’ve just been putting the filter on top of the glass and screwing the bezel back on.

I will be testing the 10, 20, & 30degree film as soon as I get home. Will send Goshdogit a section of each to post some more comparison pictures.

As it is right now, I believe I will order a few sheets of each, and if people want to buy some at virtually cost, I can cut squares for larger lenses, and maybe have circles cut for more standard sizes like the S2+ and the C8.

These film pieces can be mailed internationally in a letter.

goshdogit
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RobertB wrote:
I will be testing the 10, 20, & 30degree film as soon as I get home. Will send Goshdogit a section of each to post some more comparison pictures.
Great! I’m looking forward to testing the other diffusion angles.

I’d like to take photos in a couple different locations, and do some short-range comparisons for smaller/dimmer lights.

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This stuff is really great. I’ve tried taking some beam shots but the only camera I have is on my phone. I couldn’t get them to turn out very good st all:(

mattlward
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I have a couple of lights that I use on the headboard of the bed at night. I would love to see this in a size that would fit the Pineapple and the S2+. I would be in for purchase of either thin material or a real lens for one or both of them.

EDC rotation:
Convoy S2+, 6*7135, XM-L2 3D, 10 degree TIR, PilotDog lighted tailcap.
Convoy S2+, H17F, XM-L2 4C, lighted tailcap
Zebralight SC52w-L2
Olight S1A
Olight S1R

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Good find Robert!
Man, goshdogit those comparison shots you took really do an excellent job showing how well this stuff works. That is a pretty amazing spread of light. Very smooth and even. I just have to figure out which of my lights I want this on but I know I want to try it on a couple. It certainly would be great on a headlamp but I don’t have a headlamp yet. Gotta fix that. Anyway, nice work guys. Thumbs Up

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