What you comprehend as best thrower fog colour also can be explained by which colour is the easiest for the human eye to process. This also explains why car fog lights are yellow. They are not allowed to be red, green or blue, because of the traffic lights. And they don’t want all kinds of different fog light colours in the traffic like pink, cyan, violet, turquoise etc. Therefor the improvised standard for fog lights is yellow (3000K). So for a flashlight to be used as a fog light outside the traffic, red or green may still be the best, as these correspond to the red and green receptors in the eye.
Hmmm. Interesting approach. I own a couple of red lights. I’ll buy, test with the other colors and let you know… Wow, red foggy light reminds me horror movies.
2.5A would be also a sweet spot for yellow also, not only the red Osram. Just for the yellow, spec sheet shows around 2.8-3.3V forward voltage depending on current.
Can this driver output this voltage, or it is only meant for 2.0-2.5V, as seen for the red emitter?
The voltage of the yellow light monochromatic light chip is the same as the red light, but this yellow light is a mixed light of blue and yellow light, not pure yellow light. The chip it uses is still a blue light chip, so the voltage is still 3.0-3.6V
The highlighted color bin on your pic is U2, but the bin offered by Convoy is U6. getting those –0.0030 –0.0060 Duv bins (like U2) would be amazing but it’s possible they don’t even exist.
As for driving those LEDs, no difference with other 90CRI LH351D, max rating of 3A but can be driven without issue to 5A, linear drivers adjust voltage ( which is higher than 3V above 1.2~1.4A ) to get the desired current.
I see no reason for such driver not to be able to output regulated voltage and current (almost) up to battery voltage, as any other buck drivers. These are built the same way, only the inductor may be tuned to handle slightly more voltage difference (higher Vin to Vout with higher inductance value). So, I am fairly sure that such driver can be used with a higher voltage emitter.
Ah, I guessed (or at least hoped) so, I just wanted somebody to confirm this :)
Anyway, I looked at the available modes of that driver, and maybe it is not best for me.
I started to consider this FY emitter as a good candidate for biking light (easy for the eye, not white, but still many colours - also, not exactly the tint called cadmium yellow, but not far from that), so I postpone my initial idea of using it in a C8+, and probably, I'll go for an S2+ build with the 7 mode driver (10%-20%-30%-40%-60%-80%-100%), that is the most close to what I generally want to use. Maybe I'll add one or two extra 7135 chip on it to make it 1.4A or 1.75A, but not more. I didn't bother programming a driver for my desired output ranges yet. It has medium frequency PWM (I saw 700Hz+ in a review), but it is not like the cheapest drivers and it is not noticeable, except in extreme unfavourable conditions.
