Fireflies E07 preview

Isn’t the brightness difference due to the XPL being much more efficient in lumens/watt compared to the nichia? ie. for the same milliamps and volts the XPL will be brighter.

He swapped the LEDs and the issue did not go with them. So presumably it’s a hardware (7135) variation or firmware (floor setting) difference.

Lol, I did. No flicker, but that’s the floor on both. One click on both setting up floor.

My previous post will show the XPL moonlight lower than the nichia before the swap. I think it’s got to be something with the driver

It’s those small variances in componentry that cause it to be difficult to pre-set moon… they just aren’t all the same.

That's why I made moon mode level configurable - I got lights with a "glow" for moon light PWM level 3, some work decently, others don't light up at all on PWM level 3. Also some work at level 2, and I think at level 1, some don't.

I managed to reduce the hardware sensitivity of moon level, but didn’t eliminate the issue entirely. The method for doing this is to underclock the MCU at the lowest few levels, which makes each pulse longer but farther apart. The overall brightness is similar, but it’s less volatile, less variable from one chip to the next.

Comparing the two methods…

Adjustable moon at full speed:

  • + Moon level can be lower.
  • + Moon level can be somewhat more consistent from one light to the next, if each one is calibrated individually.
  • + Virtually impossible to detect any PWM.
  • - Moon may be fine on a full battery, but may not illuminate at all on a low battery.
  • - Generally requires calibration for each individual light.
  • - Uses about 5 to 6 mA of power, even at the lowest moon level.

Dynamic underclocking:

  • + Less sensitive to subtle hardware changes, so moon level is more consistent from one light to the next.
  • + Less sensitive to battery voltage, so moon level is more consistent as the battery gets low.
  • + Uses about 1.2 to 2.2 mA of power, so moon runtime is typically about 3X longer. The next few low modes also have increased runtime.
  • - Not adjustable for each individual light.
  • - Moon level may be higher than desired.
  • - PWM might be visible for a few people… though it’s still invisible to most.

Six of one, half a dozen of another. Different people choose different tradeoffs. Perhaps in the future we’ll use MCUs with more pins and we can have a dedicated power channel for moon… like how the lighted button works. Or the button channel could be used for moon instead. This would provide even higher efficiency, with no PWM.

Still waiting for word on copper and/or titanium version!

Just a few xpl hi 5000k and nichia 219b comparisons.
White door plus shadows from chandelier
Xpl light
Nichia light
Room chandelier light on wood dressers
Xpl on dresser
Nichia on dresser
Love the throw/lumen power of the xpl, but the nichia really makes the browns and reds look deep and vibrant. On turbo the xpl looks “to the eye” double the lumen output of the nichias. You can see the xpl has tighter hot spot also. I’m glad I have both. If they start matching the button leds with the aux lights, other than purple, I may be getting the sst model. It’s just hard to beat the the amazing output of the XPL HI emitters they offer.

If you adjust your aux lights make sure you don’t use any precision screwdrivers. One of mine broke off when trying to adjust with a micro screwdriver. Be gentle and use your finger or maybe a pencil eraser for grip. I thought I saw a slit for a micro screwdriver in the center but it isn’t. So be careful. I ended up dripping a solder blob to obtain max brightness back on and now the only way to dim is remove that blob……

+1

Thanks for the tip Firemedic, I totally would have done the same thing!!!

Edited below to add measurements with Lishen LR2170SF and Samsung 50E. I believe the LR2170SF is the best cell for the 219B version eventhough it outputs the same as the 50E at full charge, but as the battery depletes, the LR2170SF will be able to output higher than the 50E.

Fantastic work, Firemedic. :+1:

does samsung 50e really fit this light ? 40t seems like a tight fit.

Yes, I’m using mine with the 50E and 48G with perfect fit and electrical connection.

okay good to know.

This was posted by TwistedRaven on CPF

Luscious! :heart_eyes:

And I found it from xamsiem on Reddit.

I may be tempted to mix and match.

Maybe put this head on my clear coat body. And the copper body on my clear coat head. I don’t know….