Extremum - 550 lumen from keychain flashlight

Bad angle maybe. It is 55mm kit lens on slr with 1.5 crop factor.

We’re not making some extraordinary money on that project. And price includes worldwide shipping.

I have to say, you’re handling the hazing pretty well, all things considered. Kudos

How do you operate the light

I push button and select mode :wink: Any other variants? :wink:

I don’t see any hazing, but come on the guy come on a flashlight enthusiasts forum to sell some suposedly revolutionnary product with hazardous performances claming…
I’m all for new product, KS project and so on… but I don’t like false advertising.
All I see are questions from potential customers to a product seller :slight_smile:

And I’m trying to answer all questions honestly and frankly speaking I’m not a flashlight specialist as you see. I’m good at CNC machining, has collaborator that is good in electronics etc. So, sometimes we will ask questions on this forum to flashlight enthusiasts to build a better product.

Now I understand where was my mistake ( I mean focusing of beam and lumens) and I really don’t want to exceed 800ma so I’ll measure once more lumens and change characteristics.

I otally agree with this method, and we can be a great help when people don’t pretend to know everything.
I like that you say you’re not a flashlight expert :slight_smile:
At the end, lumens aren’t that important because you clearly made the most powerful 10180 flashlight AND with a proprietary driver, firmware and an e-switch. 800mA in this format is insane, BLFers are going to LOVE that :wink:

So I have question about beam and optics. We’ve used specially ordered lens to achieve wide and almost uniform circle. It’s good for edc keychain flashlight or we need to make it more narrow with fade to edges?

I think the question was about how the driver moves through the modes as the button is pressed. Like I said before, we have quite a few custom firmware options around, and they all operate slightly differently from each other.

Example: short press - Off > Lo > Med > Hi > Strobe > Off

You could also have your modes moving in a different direction, or a totally different order. Short press is the usual way to get around, but we also have medium press and long press, not to mention double-press, press-and-hold, and some others. We can have some very complicated, yet also very useful, functionality that way.

I think for a keychain EDC flashlight, this is perfect.

For a keychain light this is perfect, I mostly use mine to find locks in the dark or look under car seats, so throw isn’t needed at all, and a nice flood beam is great.

Finally received copper 10mm base for xml-l2. Much better heatsink, but I don’t think we should increase current. People won’t like smth like 1000 lumen for 10 seconds ;))
Will update kickstarter project draft soon.

I think 800mA is a respectable amount of current. Just make sure your listing shows the actual output from 800mA instead of claiming 550lm, which isn’t possible from 800mA. You’re right, that most people won’t want 1000lm for 10 seconds. Please consider making it moddable for those of us who do want that option. :smiling_imp:

U3 datasheet gives about 380 lumens 85°C 800mA

I understand and about 7% loss on lens (our lens is not TIR lens). Sorry for claiming 550 lumens. That wasn’t made on purpose.
Ok, right now I confirmed that

- uniform flood light - ok

  • ~400 lumens - more then needed

Lets talk about modes. Right now modes switch in such way: Off- 20 lumens - 120 lumens - 400 lumens - strobe at 400 lumens
To switch mode you need to make double click (to avoid accidental switch). Maybe you have some propositions?

Ok let’s start the Kickstarter . I am ready to pay up to 40$

So, a single click to turn it on/off or a double click to switch modes? That’s good enough for me. :+1:

If you’re “ready” then you should get the Early Bird for just $35. :wink:
ProjectOne, when is it scheduled to go live?

Double click to change any mode. Off is also a mode. Off -> double click - > low -> double click ->high etc

Made this to prevent accidental switches. What’s your opinion?

About kickstarter campaign
On monday we’ll ask KS administrator to approve project. That usually takes 3 days. Maybe next week we’ll start.