@DBSAR, I have already spoken to Sofirn about the bin tints and LED tints to use with the right order code. That was a WHILE back though, so they may not remember about it.
However, if Barry can confirm which LEDs they’re using, they should be these, if I’m not wrong:
@sbslider, this is in regards to the type of linear regulator used. It can either be a single purpose linear regulator, like a 7135, or a FET used as a linear regulator
FET as a linear regulator, will always be better, but let me explain.
- A single purpose linear regulator will run at a constant current set by its specs at 350mA.
If ran at 100% duty cycle, the linear regulator will output 350mA to the LED.
If ran at 50% duty cycle, the linear regulator will output AN AVERAGE OF 175mA, meaning the LED will still see 350mA, but at half the time. This is what we usually do in linear drivers. However, they don’t behave well at thousands of hz, and the efficiency of the LED stays constant, even though the average current will be lower. While in fact, it should be more efficient.
This is where the FET as a linear regulator is very useful, rated at say 350mA.
- If ran at 50% duty cycle, it will output a constant 175mA, meaning the LED will now see 175mA, and its efficiency will be increased at lower current, along with the FET easily handling 100s of kHz of frequency, removing parasitic inefficiencies.
The major downside to the 2700K is the significant drop in efficiency compared to the 3000K. I’d prefer 2700K of they were the same or close, but would prefer efficiency since they are not.
@ BlueSwordM and fixed it, thanks for the explanations. I definitely have noticed that LEDs get way less lumens/mA (or lumens/W) when they are driven very hard. But I was under the belief (perhaps, or likely wrong) that at lower drive currents, the lumens/mA curve was pretty constant. So with 4 LEDs each drawing 350mA (fairly low current) the efficiency of the 4 7135s can be no worse than the efficiency of a single FET. But at lower currents, if the switching performance of the 7135 is lousy (sounds like a great BLF improvement project!!) then I can see where the efficiency of the single FET would be better.
I don’t know what Lumintop did to offend you, but it would be great if you could stop spamming every single thread. If you have something to say, make your own thread and say it.