Original conversation between me and Edward (Luminit)
“…The only angle we can offer at this size, 609.6mm x 2400mm, is our LSD 80°. It will cost $600 for one sheet.
In order to be able to place an order and send you a sample, we will need your shipping account number (UPS or FedEx)….”
“…At this size, we do not have a lower cost option. However, in volume, the price will go down. At 150 meters long, the roll is $6900….”
For flashlight application the cost per unit diffusser you get would not be too expensive. I think Pflexpro already selling similar/same stuff.
I’m telling you: this kind of holographic diffusser is awesome! Never seen anything like this before. You can order with/without A/R coated too. Luminit’s screen for projector also works like magic.
The Luminit stuff sounds awesome, and I’d love to use it on a few lights… but I’m okay using cheap stuff. DC-Fix works reasonably well and it’s $16 instead of $600, for a similar quantity.
My project was a huge promotional light panel which requires very thin yet uniform light distribution. But even then, we decided to go with cheap MIC panel for only 1/10th Luminit’s price. A bit thicker but with more LEDs problem solved.
I have 5Deg, 30deg, and 80deg in 10ml 8.5”X11” sheets. I have another 5deg in 30ml sheet. The 30ml is thick and could work as a lens in its self. The 10ml is thinner and I would use it along with another lens. It’s not sticky, though you can get sticky, so it’s held in place by the bezel. Both thicknesses can be cut with a strong pair of scissors. The 30ml can then be filed if desired. The lens I cut for this light is of the 5deg 30ml sheet.
This stuff is amazing! It really is. I have some Dc fix and that works nice though it works bynscattering the light. The luminit works by reflecting the light in a more controlled fashion. I would describe it like a bunch of holographic imigaes over lapping to form a uniform beam.
It works wonders on triple and quad lights. It can make them shine like a single led light with no artifacts or beam distortion. I put one on a triple pt18 mod to nichia’ for another member here and he was very impressed by the results.
Hello tk, hmm, maybe I can try a runtime chart? Let me look into it. The light definitely regulates faster than 8 mins. When in turbo I think it starts to drop at the 45sec mark or so. It is very hard to notice the drop by eye as the transition is very smooth. With the thermal regulation set to aggressive, I can hold the light on turbo to the 2min mark. That was as far as I ran the light on turbo. Even with thermal regulation, I would caution whoever ends up with this light to cautiously use the turbo setting on this light. On a setting of 3/4 power or so, I did run the light for a full cycle without over heating and it kept a good output.
This driver was a gift from dr jones. It is the successor to the h15f called the h15f+. He designed it for high powered lights like triples. It has an upgraded fet, but I’m not sure what the software changes were?
I’m also not sure if there are any software changes or if it’s just a bigger FET. Last I checked, he sets the lock bit on the attiny so the ROM can’t be read by an external device, so we can’t even compare a ROM dump to see if it changed.
The regulation is indeed very smooth, very hard to see. But it shows up nicely on a sensitive device like a lux meter or a phone, and the graph can reveal a lot about what it’s doing internally. Like, on mine, it appears to slowly step down one PWM level at a time, one channel at a time, until the temperature is no longer above the configured threshold. This makes the change almost invisible to the eye.
It works fine on my DC2. It never gets too hot. Meanwhile, even though the regulation on my D4 is much more aggressive, it still gets painfully hot during the first minute. Different host, different requirements. I’m curious how the H17F(+) performs in hosts hotter than mine.
(edit: to be clear, I’m not interested in buying; I’m just preoccupied with thermal regulation lately)
I can find a hundred apps for android but not even one for iOS! Paid or free, nope, nada!
Maybe I can use my computer somehow? I don’t think it has a light sensor though. If it does I doubt it is accessible by apps.
I do have a nice lux meter so I could plot out a graph myself. That doesn’t sound like a fun use of my time though… if I can’t figure it out I’ll fall back to the pencil and notebook nonetheless.
Do you know how I could plot out a graph from a list of numbers? Well I know you know how but do you know how “I” could do it.
I remember doing it with excel back in the day but now I’m stuck on iOS and it has made me dumb.
There is no obligation, I’m just curious. If it was easy it would be nice, but it sounds like it’s not, and may not be worth the effort.
Usually when I graph things I make a quick graphing script to match whatever data I have. I haven’t attempted to graph data in a spreadsheet (though I’d imagine it’s probably pretty straightforward). The hard part is recording the data, which is a pain to do manually.
Ok. After looking through probably over 50 apps and downloading and testing 10+ I found an app that will record data by the second. It will then slow me to export a csv file of the data. Then I should be able to find an app to graph that. I have a few other this to get to first though.
I’m thinking there must be some limitation by Apple that stops apps from recording and graphing? If that’s the case, I won’t mention the name of the app publicly. IDK. It’s just weird how many android apps can do this and how NO Apple apps can. Anyway…
It’s probably a side effect of the walled garden approach Apple uses. It greatly reduces the quantity and variety of available apps. It’s also possible that some other app already claimed the desired functionality, so other apps have to omit that in order to avoid being marked as duplicates (and thus rejected from the app store). Apple has this weird informal patent-like system going on where they try to avoid having more than one app of the same type in the store.
I’m just guessing though. It could be coincidence.
I couldn’t leave well enough alone and decided the knurling needed more attention. So, yes, I really did file, sand, and polish all four surfaces of EVERY point in the knurling on both bodies and the tailcap! This took me hours but I am now fully satisfied with the light. The difference is hard to capture on photo, but it is night and day difference. And it feels much more gentle in the hand. In my opinion it is much more appropriate than the uncomfortable spikes it originally had. My goal was to remove all traces and marks of manufacturing. I came pretty darn close to reaching my goal. You would be surprised at how many “imperfections” one can find on an already decently finished looking light! I do not yet have photos of the finished product but I will add them as I take them.
