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

How many lumens does your C01 Red produce, in stock form? I would like to crosscheck my meter with yours…

on my meter it only makes 1.2 lumens

I consider the C01 Red pretty useless, except as a spare battery carrier

imo sanding the LED dome will not make the light more useful, just dimmer

how about potting the whole “cone” where the led is with clear acrylic, kinda turns the whole thing into a big TIR lens and shouldn`t lose any light, if it remains the same (and it shouldn`t be) doing scotch tape over the front would now be possible.

Potting the front with clear acrylic will remove the lens function of the front curvature of the 5mm led, it will turn the light in a sort of mule, but with a weird reflector effect. Could be a nice beam by chance though.

I measured both red C01’s properly, and it is worse: the untreated one I measure 0.45 lumen, the one that I sanded the reflector and led of I measure 0.21 lumen. But it is not guaranteed that before the sanding operation both lights had the same output so it is kind of a bad experiment :person_facepalming:

About measurement cross-checks: this is about the worst way thinkable to check light measurement contraptions. First we do not have an idea how much variation there is between output of different red C01’s, could be a lot. Second, the region of the spectrum that I found luxmeters to have the highest errors is in far red, usually they read multiple times too high in far red (as also seems the case with your luxmeter), even if the performance over the middle part of the spectrum is very reasonable.

thanks!

you probably used a different conversion factor than for white light

in any case, very helpful

I find the C01 Red rather dim, and the beam is poor. Sanding the LED makes the output lower, and the beam is still not very good…

I prefer the C01R… it has a lower minimum, plus two higher modes, and a very nice beam

No. I have seen the spectral sensitivity curve of my luxmeter (a Mobilux class A meter) and it is extremely accurate even at the flanks of the visible spectrum. So I can use the same conversion factor for all sources of visible light.

ok, good to know your numbers are solid for both red and white, with the same conversion factor

my output value for the C01 Sophia is 6.6 lumens
I think that approximately matches yours for the C01 Sophia

so since my red reading of 1.4 lumens for the C01 red is 3.5x higher than your reading of 0.4 lumens, I think you are correct :slight_smile:

very helpful

Does change resistor will incerasse output of Red C01?

Yes, if you change the 220 (22 Ohm) resistor for a lower value, the output increases, you can even bypass it for the highest output.

So C01 and C01 Red Led have same driver?
I mind to swap the Red Led with the rngwn’ 5mm white

I may be showing my ignorance here, but why would the driver be different? I see the driver having two functions: Boost or buck the source voltage to the correct voltage for the LED, and, in the case of a multi-mode light, make the appropriate supply changes to the LED for the mode selected.

Does the 670nm led have a different forward voltage than the others?

It does have a significant different forward voltage, under 2V, while white leds are over 3V. But still I expect the same driver, but maybe the resistor limiting the current has a different value.

Swapping the red led however requires removing the potting, I read that it is possible but personally I have not attempted that.

Did the same mod djozz did, 32K-EX and bridging the resistor (accidentally removed it :person_facepalming: ). This is really bright. Lots of pleasant light from a 5mm LED. Highly recommend.

Yes, yes, there’s an o-ring.

Any AA/A bost driver with white Led can accept a Red led
and tension will be auto adjust by driver?
The only concern will be the max current output.

I think yes, but I have no great expertise in electronics, and have no idea about the “auto-adjust” thing.

Sari33

if you modify a C01 Red
and have success removing the potting, and installing a Sophia LED

I would like to copy you

please share photos and info,

good luck!

and dont forget to reinstall the O Ring… :innocent:

What is the white washer?Silicone glue or plastic?
Sorry,maybe I will only sand led and try get more flood for go on bath at night…
Anyway my sample it’s brighter than the lowest mode of C01R SST20, both ni-mh batts at 1.2V

Hard plastic, potting compound. They say it can be dissolved/softened with I thought it was thinner. And with heat.

Yes, heat in the beggining and start taking chips of it. When you feel you’re close to electronics then soak it in thiner.
This method was used back in the days with Fenix E01 and Inova X5


For do that better high pressure on Led head or hammering?
Think will be not easy,will try to heat a bit also