If you take my test of the 2mm2 White Flat as guidance, at 6A you are at 120% of the maximum rated current and 93% of absolute maximum output, is that what you call underdriven?
The 1mm2 gives less output and a bit more throw. The driver is regulated at 6A? You may want to look at the convoy store, they have a similar driver regulated at 5A if I remember well.
The 5000mA driver from Convoy gave me 4570mA on its highest setting while powering the 1mm white flat, so i guess it is not quite 5A driver which is perfect for the 1mm led.
That is similar behaviour to that of the 17mm / 22mm driver for SST40 (weird firmware, max 8A). One of my ∅22mm units stock delivered ≈7.63A, and another ∅17mm one (with swapped sense resistor for 5A, R010 + R050 + R200) was delivering 4.75 - 4.8A according to my precision PSU's amperimeter. In essence, 95% of rated maximum values.
The latter is paired with an CSLNM1.TG (1mm²) and I am happy with it.
BobbyMK if you want to push that a little bit more the math is easy. V = I × R = 4.57A × 10mΩ = 45.7mV sense. Stack an R100 on top of the stock R010 and you should get 10% extra maximum current, 5.027A.
No such thing (edit: "no such thing as a stupid question" is what I meant here, I re-read this later and decided to clarify)
According to Led4Power earlier in the thread, essentially yes. There may be slight binning differences (flux and/or Vf) between them, or at least between the batches he got.
Bonus points: Boost HX is just the 2mm2 white flat, on the larger die.
Thanks for your reply, maybe i should have asked earlier, not after ordering :person_facepalming:
That 4040 CULNM might be just what i was searching for
I use this driver in B158 and paired with the CSLNM.1 it has 370kcd throw, last time i measured without driver and NCR B battery to limit current it was about 380kcd. I think this is the sweet spot for this led.
That is a Sofirn C8S host with Simon's 22mm SST-40 (max 8A) linear driver. Driver filed down to a tad less than ∅21mm and modified with an additional (slightly contact worn) R050 sense resistor. Measured 8.1A+ max current with power supply.
I am getting 132-133Kcd at 30s, 137-138Kcd peak, at close to 5 meters of distance using ceilingbounce app. Measured the same way I did with M1.
I measured ≈150Kcd for this build weeks ago, with an old reflector I swapped due to some minor damage. Driver was not modified at that point (I measured ≈7.63A back then).
Smartphone is a Lenovo Zuk Z2 Pro (Z2121 with custom Oreo 8.1 ROM). Do not know how good or accurate it is measuring illuminance, albeit I know it measures less than a Moto G 2013.
But heck, the intensity is way off I think. It should be getting at least 180Kcd… should be. The reflector's opening is ∅9mm, and is a little bit taller than the usual Convoy reflector (≈32.2mm).
I do not honestly know how well focused is the emitter in my C8S. I lowered the reflector gasket quite a bit, until the 5050 square gap surrounding centerpiece eroded and dissapeared. Did I go too far?
Concerning the M1 (@ 4.75A), it scores above 100Kcd cold start so that must be right, the M1 reflector surface looks to be about half of a C8. And its surface finish looks of higher quality (versus C8S).