I found out that the LVP goes by the same voltage it blinks out (the MCU blinks the voltage it sees and LVP is controlled by the MCU). So if the voltage reads a bit lower than actual, LVP will activate a bit sooner.
I dont think there is much in the way of fixing the thermal stepdown behavior. On some driver designs the stepdown works well and on others it acts not so great.
Has anyone tried setting the top of the ramp a tiny bit higher or lower and then checked how the thermal stepdown responds? Maybe it will change.
They are also sold as Vapcell 5500 and Keeppower 5500/6000. Have you tried a search for those? I guess it just depends on whether any stores in your country are importing them. Theoretically, if one of your stores can get the older Keeppower 5200, they may also be able to get the newer 5500/6000.
EDIT: Updated test with Vapcell 26650 4200mah, Copper SST-20 4000K Max Output (UCL lens): 4410 lumens and 4,480 lumens
I’m surprised the copper version is so much brighter than my silver aluminum version. Also the cct is cooler and the tint is much better (less green). I wonder if Lumintop used the FA3 tint bin in the copper version and the FD2 tint bin in the aluminum version. TA said Lumintop was able to buy about 1,000 of the FA3 tint bin emitters and the rest were the FD2 tint bins.
I wonder if the brighter output is due to a better emitter bin or is it because copper conducts better. I tested swapping the copper and aluminum tubes in both lights and didn’t see any change in output in both lights so at least we know copper tube will not increase output.
Despite measuring brighter, the copper version actually doesn’t look as bright on the wall because the hotspot is noticeably less defined as if it is shined through a diffused optic. The aluminum one has an obvious circular hotspot, with the hotspot yellower than the spill. The copper version hotspot tint and spill tint is the same so maybe that’s why I don’t see a defined hotspot but it’s strange since the emitter is the same SST-20 under the same optic. The more negative DUV of the copper version really makes things look nicer, cleaner, and more neutral white. I’m a fan of very warm temps but not yellow tint (+DUV), so to me I like the copper version beam color much more than the aluminum version.
Btw, the Golisi 4300mah produces 13% higher output compared to the Shockli/Vapcell 5500mah. However, Golisi 4300mah measures about 4,200mah whereas Shockli/Vapcell 5500mah measures about 6,000mah.
I have tried to change the max ramp level up and down and no matter the level it starts to step down after few seconds, something that i noticed is that in Lower voltage 3.8V and down of the battery this isn’t happening, another case is when i ramp a few times it starts to sustain the max ramp level. So i don’t have an idea where exactly is the problem.
I like the more yellow FD2 bins that FF uses over the MF01’s ‘cooler more white’ 4000k bins, whatever bin that maybe. The FD2 of FF looks ‘rich yellow’ while the astrolux looks more white.
Hi guys I wanted to address the most common issues with this light and some solutions I found, but I decided not to spam freemes thread so much so I made a new one for technical issues with this light:
Its based on info I got from Lexel and ToyKeeper. It adresses thinks like LVP, incorrect voltage measurement and the light throttling down from max ramp.
Tint on the 4000K is worse than I expected. Now I’m torn between trying to lower the DUV by swapping three leds to 2700K SST-20’s or swapping all to 4000K SW40 219B’s.
The target would be to get a acceptable (= zero duv or below) 200lm mode. I see the 2700K is in the BBL at that power, but the FD2 quite high above it.
Actually I don’t like rosiness at 4000K but prefer a neutral- slightly rosy tint.
From my experience 4000K on the BBL is a little yellowish for my liking. 4000K at DUV –0.002 looks much more neutral. 4000K with DUV of –0.003 to –0.004 for me seems perfect neutral white because I don’t see any yellow or pink unless I compare it side by side with another light of different tint. Maybe it’s my eyes or the ambient environment I’m in.