LED test / review - 36-chip 9090 LED very similar to FFL909A (9 V, 4000 K 90 CRI rosy) - over 10000 Lumen with rosy Tint!

[merlot]

There’s some useful info on swapping resistors to alter output voltage range here:

Changing the voltage of a boost driver

Hi All, Looking to put an emitter in that can take up to 8v/2a (Yingfeng HYF90E42N660AG-D9A) in a M21b, and would like to eventually upgrade from a Convoy 6v boost driver to a Hank driver that can provide the full wattage. I think I can get 8v/2a by reducing a 12v boost to 8v (per the calculations from m4potofu on reddit here): TopR = BotR * ( Voutavg - VFB ) / VFB Where VFB = 1 and Voutavg is roughly the average VF of the LED, so ~6V for a 6V LED. If I use VFB = 1 (not sure if this is a …

Convoy 22mm boost driver Modding Help please

Hi all. I have the 22mm boost driver for XHP70.2,XHP70.3 HI,input 3-4.2V,output 6V 5A,no pwm,constant current,4modes,12groups driver. Lots of good pics of the driver here https://shorturl.at/EUW0G I would like to run four UV leds in a 2s2p configuration with this driver. In its current state it will not power the LEDs to more than about 200ma. I assume this is because my LED voltage is higher (about 7.45v). I will also need to make an adjustment to the current. I would like to Pay …

Efficiency measurements of a few drivers

I ask for advice, I’m a noob in this business myself, but I know how to solder Can the d4k 12v 2A boost driver be converted to 6v 4A If so, what components need to be replaced on it? As far as I understand, reducing the voltage will not only allow you to work with the b35Am (I also have one substrate from Clemence), but will also increase efficiency? [IMG_20241012_184308~2] [IMG_20241012_205123~2]