I’ve read they are m2.5 5mm long. I bought 10mm long brass screwsand plan on cutting them down
Driver: M2.5×4mm *2 pcs
Tail pcb: M2.5×5mm *4 pcs
Reflector: M4×10mm *1 pc
MCPCB: M2.5×10mm *2 pcs
Thank you! Just ordered M2.5×6mm brass screws because the modification I have in mind will need slightly longer screws.
Is there a quad Nichia 219B version of this light? Or just a quad Nichia 219B mcpcb?
you can reflow the XP-L Emitters and change them to 219B or 219C. Its the same LED-Footprint.
So I replace the standard LEDs with 4 of” these”:Nichia 219C D240 4000K - Bare LED - 90+ CRI?
Best place to buy? I’m in Europe (most of the time)
4c3ad6
Member clemence’s shop is the best source for high CRI Nichias. Ships worldwide.
Thanks, ordered 5.
Will any type of solder paste do? Or is there a special types for hot leds?
TomE would you please check your PMs. It’s been over 11 weeks since your last response indicating you were finished modifying my q8. Thanks in advance
May I introduce BLF Q8 Janus:
2 Heads, one white, one with red, green, blue and amber LEDs, heads and color LEDs individually controllable.
The modified MCPCB with XP-E2 color LEDs, and my driver which is used in both heads. In the white head populated with FET + 7135, in the color head populated with 4 x 7135 for each LED. MCU is Attiny 841. Full ramping UI of course. The reflector bottom had to be grinded a bit to make room for the outer LED wire pad. Reversed MCPCB polarity (batt+ at the outer trace to keep grinding at a minimum).
Cut a solid 6mm brass rod and soldered a spring on one end in order to bring batt+ to the rear head. Used tape to isolate the rod and drilled a hole in the tail PCB.
The threads at the rear end of the battery tube are too short to reach the driver board so I made cut outs (for the PCB screws) to a copper ring and put this ring above the PCB.
Btw., this is how I program my Q8 drivers:
Excellent work! I love it! :heart_eyes:
UV might been also a good 4. color
What MCU are you using?
That is very impressive Flashy Mike!!! :+1: … 
Attiny 841 with 6 PWM channels which can almost freely be assigned to 8 output pins.
Yes, I was also thinking of UV but not with this light since it will also be used by my children. If I use UV in an other multi color light I probably will add some security code into the firmware to avoid unintentional activation.
I decided to ‘Foybezel’ my Q8s. :partying_face:
I used a belt sander with a 40-grit belt, an orbital sander with a 120-grit disc, and a few minutes of hand sanding with 180-grit and 400-grit laid on a flat surface.
I also applied some thin strips of adhesive vinyl between the fins to tell them apart.
Nice job goshdogit. They all look very neat.
Very nice.