[Available again! - BLF special edition light] new Sofirn AAA twisty high CRI 5mm LED

3382 posts / 0 new
Last post
Havok
Offline
Last seen: 1 month 3 weeks ago
Joined: 08/02/2020 - 20:41
Posts: 24
Location: US
djozz wrote:
About the beam of the mod above. The RWN05-32K-C-EX led has slight tint unevenness over the beam, but what is more obvious is a ringy “hotspot” caused by the reflecting aluminium of the C01. I may lightly sand the led itself at some point to make the tint more even, but the hotspot was smoothed out very effectively by circular sanding the reflector with 180 grit sandpaper. The appearance of the reflector did not change much, but the beam did. Left sanded, right stock. !{width:100%}https://i.imgur.com/ESrENB4.jpeg!

Think that might help the red C01 as well?

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam
Havok wrote:
djozz wrote:
About the beam of the mod above. The RWN05-32K-C-EX led has slight tint unevenness over the beam, but what is more obvious is a ringy “hotspot” caused by the reflecting aluminium of the C01. I may lightly sand the led itself at some point to make the tint more even, but the hotspot was smoothed out very effectively by circular sanding the reflector with 180 grit sandpaper. The appearance of the reflector did not change much, but the beam did. Left sanded, right stock. !{width:100%}https://i.imgur.com/ESrENB4.jpeg!

Think that might help the red C01 as well?


I doubt that (but I do not have one to check), the bad beam of the red C01 seems to me not caused by the reflector. I think it is because the light emitting area of the red led is much smaller than a white led because it has no wide phosfor layer. And small light sources need carefully manufactured optics to make a good beam, the top surface of a cheap chinese 5mm led is likely far from optical quality, or even 5mm Nichia leds.
Havok
Offline
Last seen: 1 month 3 weeks ago
Joined: 08/02/2020 - 20:41
Posts: 24
Location: US

Thanks djozz, I might try it tomorrow before I Scotch-Brite the led. Just to see if it helps.

ReManG
Offline
Last seen: 6 days 19 hours ago
Joined: 04/25/2015 - 22:52
Posts: 2666
Location: Between the Mexico's

djozz wrote:
I should start with a fresh battery, but the light has been used for around 8 minutes now and I’m at 21 lumen. I will keep it on and see what we’ve got in an hour or so.

Edit:
-8 min 25 lumen
0 hrs 21 lumen
1 hrs 15 lumen
2.5 hrs 12.5 lumen
4 hrs 9.5 lumen

Djozz, thanks for this, this will be a great little backup light for hiking, starts high and keeps it pretty good for 4-6 hours, that is what I was looking for. Much appreciated.

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

Measured up to 7.5 hours now, time to go to bed. Will have another look tomorrow if there is still light, I assume that just as the unmodded C01 it will drain the battery to completely empty. The runtime chart sofar:

iamlucky13
Offline
Last seen: 7 hours 1 min ago
Joined: 06/22/2018 - 09:18
Posts: 916
Location: USA

Hmm…no regulation without a sense resistor to regulate. I guess I should have seen that coming.

I assume with something in between, like a 10 ohm resistor, we’d see in the ballpark of 12-14 lumens steady for maybe 2 hours or so, then the long decline.

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

Another datapoint, 14 hrs / 0.6 lumen.

Yes, no regulation, I already noticed that without resistor it does not light, it is simply is series with the led somewhere I guess (before or after boosting?, no idea how that works really).
I’m not fanatic in constant output, a steady decline is useful, like the incan days, there is not so much that demands steady brightness and a slowly fading light does not leave you with surprises.

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

I had ruined one black C01 while finding out about the potting. So it was spare for some fun. Smile (did this to a sk68 too a couple of years ago)

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

Katherine Alicia
Katherine Alicia's picture
Offline
Last seen: 34 min 26 sec ago
Joined: 08/21/2020 - 17:27
Posts: 217
Location: Central UK.

LOL it`s even cut one of the Vias in half! Big Smile

Noir
Noir's picture
Offline
Last seen: 3 hours 3 min ago
Joined: 06/03/2018 - 09:13
Posts: 99
Location: Germany
That is one awesome pic! Thumbs Up
Henk4U2
Henk4U2's picture
Offline
Last seen: 36 min 36 sec ago
Joined: 02/13/2014 - 17:52
Posts: 3800
Location: The heart of the Netherlands (GMT+1)

Well done. You can’t deny the potting crew did a good job on that one.
BTW I downloaded a copy of the SK68 picture for “recreational use”, I can’t help smiling. Thumbs Up

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

Henk4U2 wrote:
Well done. You can’t deny the potting crew did a good job on that one.
BTW I downloaded a copy of the SK68 picture for “recreational use”, I can’t help smiling. Thumbs Up

Yes, that one was the best ever because of the irregularities and moving parts in the design Smile
ReManG
Offline
Last seen: 6 days 19 hours ago
Joined: 04/25/2015 - 22:52
Posts: 2666
Location: Between the Mexico's

Looks like you could shorten the light by trimming/sanding the head and “reflector” shorter too.

Great pics and RIP C01 used for testing…

MascaratumB
MascaratumB's picture
Offline
Last seen: 1 hour 24 min ago
Joined: 10/29/2016 - 12:12
Posts: 6049
Location: Portugal

djozz wrote:

All hail the “in the name of flashlight science” !!! Beer
Thanks djozz, that’s an awesome photo and cut!!!
Serlite
Offline
Last seen: 17 hours 1 min ago
Joined: 11/01/2018 - 16:14
Posts: 415

Neat, a physical cross-section of a light is way cooler than any CAD diagram!

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

djozz wrote:
Measured up to 7.5 hours now, time to go to bed. Will have another look tomorrow if there is still light, I assume that just as the unmodded C01 it will drain the battery to completely empty. The runtime chart sofar:


Two more datapoints: 14hrs 0.6lumen, 24hrs 0.1lumen. I call this test a day Smile Battery voltage is 0.57V now.
HollyT
Offline
Last seen: 1 month 3 weeks ago
Joined: 11/09/2020 - 08:41
Posts: 8

djozz wrote:
djozz wrote:
Measured up to 7.5 hours now, time to go to bed. Will have another look tomorrow if there is still light, I assume that just as the unmodded C01 it will drain the battery to completely empty. The runtime chart sofar:


Two more datapoints: 14hrs 0.6lumen, 24hrs 0.1lumen. I call this test a day Smile Battery voltage is 0.57V now.

Wow, this looks nice. One unsuspecting question: is such a test available for the stock Sophia LED C01 as well?

iamlucky13
Offline
Last seen: 7 hours 1 min ago
Joined: 06/22/2018 - 09:18
Posts: 916
Location: USA
djozz wrote:

Just in case anyone had any doubt remaining about whether there is an O-ring around the LED!

In fact, this shows it is better installed that I expected – there is a full groove for the O-ring. On the Sunwayman R01A, it is merely held in place in a shallow counterbore by the flange at the base of the emitter.

Great idea for the dead light, and nice work cleaning it up. I really like cutaways, even when it’s a simple item. There’s even a museum in my area that has an entire tank cut in half like this. I spent probably close to an hour studying it last time I was there.

Also, since I looked it up, here’s the SK68 cutaway post:
https://budgetlightforum.com/node/33721

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

HollyT wrote:
djozz wrote:
djozz wrote:
Measured up to 7.5 hours now, time to go to bed. Will have another look tomorrow if there is still light, I assume that just as the unmodded C01 it will drain the battery to completely empty. The runtime chart sofar:


Two more datapoints: 14hrs 0.6lumen, 24hrs 0.1lumen. I call this test a day Smile Battery voltage is 0.57V now.

Wow, this looks nice. One unsuspecting question: is such a test available for the stock Sophia LED C01 as well?

I think that someone did that for the Yuji led version, maybe even me Facepalm but it is probably buried in this long thread somewhere, and this Sophia version will not be miles different. Think the same curve as above but starting at 7 lumen, less fast decline and stretching out to over 40 hours.

HollyT
Offline
Last seen: 1 month 3 weeks ago
Joined: 11/09/2020 - 08:41
Posts: 8

djozz wrote:
HollyT wrote:

Wow, this looks nice. One unsuspecting question: is such a test available for the stock Sophia LED C01 as well?

I think that someone did that for the Yuji led version, maybe even me Facepalm but it is probably buried in this long thread somewhere, and this Sophia version will not be miles different. Think the same curve as above but starting at 7 lumen, less fast decline and stretching out to over 40 hours.

Thanks, sounds very reasonable.

The cross section is funny and inspiring as well Big Smile

iamlucky13
Offline
Last seen: 7 hours 1 min ago
Joined: 06/22/2018 - 09:18
Posts: 916
Location: USA

There is a runtime test of the 2018 Yuji version near the end of this review:
https://zeroair.org/2019/01/18/sofirn-c01-single-mode-yuji-high-cri-aaa-...

It made it nearly 10 hours of regulated output on a 900mAh NiMH cell. Since it is the same driver, and the forward voltage of the Sophia is very similar to the Yuji, performance of the new batch should be very similar.

With the higher initial voltage of an alkaline and their higher capacity at low loads, it should do a little better with alkaline.

I would plan to do an alkaline runtime test with the ceiling bounce app when I receive mine, but I don’t think I have any fresh alkalines in my house. I use NiMH for all important applications, and for everything else, I’ve found that the battery recycling bin at work almost always has plenty of cells in it that are over 1.5V.

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

One more thing for this thread.

On request of my 10 yrs old son.

He noticed that I had a new batch of C01’s and he remembered the fun of torturing it 1.5 years ago, so he demanded a fresh test. Who am I to deny anyone a flashlight test? Smile , so there we went, and with him 1.5 years stronger I was not entirely sure. But the C01 (a black and potted one) survived fine again, battered but fully functional.

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam
HollyT
Offline
Last seen: 1 month 3 weeks ago
Joined: 11/09/2020 - 08:41
Posts: 8

djozz wrote:
One more thing for this thread.

On request of my 10 yrs old son.

He noticed that I had a new batch of C01’s and he remembered the fun of torturing it 1.5 years ago, so he demanded a fresh test. Who am I to deny anyone a flashlight test? Smile , so there we went, and with him 1.5 years stronger I was not entirely sure. But the C01 (a black and potted one) survived fine again, battered but fully functional.
!{width:38%}https://i.imgur.com/gWQ8wmo.jpeg!

djozz, I’m totally new to this forum and I already like you so much. You are so lovely and so committed to this community. Love

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

Actually, I post less and less because of other stuff happening in life, but I like the C01 and I had more time this week than usual Smile

Katherine Alicia
Katherine Alicia's picture
Offline
Last seen: 34 min 26 sec ago
Joined: 08/21/2020 - 17:27
Posts: 217
Location: Central UK.

I`v ordered a couple more of these Sophia leds today, but if my son even Thought of doing anything like that to my lights, I`d whack him so hard not even Google would be able to find him! Big Smile

djozz
djozz's picture
Offline
Last seen: 1 hour 28 min ago
Joined: 09/07/2012 - 17:04
Posts: 17480
Location: Amsterdam

Scotland just passed a new law on that, you may want to look up where England stands on the subject of wacking off-spring Silly Wink

sochi111
sochi111's picture
Offline
Last seen: 2 months 1 day ago
Joined: 02/21/2017 - 14:59
Posts: 333

Just got a few of the colored C01. I was expecting Desert Tan and green.
I gave some to my friend who is a Vet Doctor, right away he said that both of the lights are almost a perfect color match for a healthy dog poop
Grad

Barry, now I am wondering what did your guys mix in the anodizing powder

Serlite
Offline
Last seen: 17 hours 1 min ago
Joined: 11/01/2018 - 16:14
Posts: 415

sochi111 wrote:
Just got a few of the colored C01. I was expecting Desert Tan and green.
I gave some to my friend who is a Vet Doctor, right away he said that both of the lights are almost a perfect color match for a healthy dog poop
Grad

Barry, now I am wondering what did your guys mix in the anodizing powder

Baha, I ordered the same colours as you.
Well, at least I’ll have a handy reference when inspecting dog poop!

Pages