【convoy】H4 and B35AM options are updated

The 3500k looks really interesting, if I read the BIN correctly it looks like a good colour.

Also do I understand from the datasheet it doesn’t like more than 3v which may be the delay as it requires a step down driver or something?

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

Will the KY CSLNM1.FY be available in a S2+ ? I assume it will be with a 3175x driver due to the max 3A handling of the LED?

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.

Report here if you try.

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.

Ok cool thanks, I interpreted the BIN wrong F2*U6*P2.

yes, it can be installed in S2+ with 7135 driver

Hello Simon.
Can you advise when will SBT90 flashlight will be approximately realised and its price?

I’m very sorry, I can’t provide a specific date.

Whenever it gets here, I can say pretty confidently this will be my first SBT90.2 light. Finally a form factor that makes sense for this emitter!

Have you seen the host/design? I would love to see it! I can’t wait to buy simons sbt90 light!

Heard it was going to be based on 4x18A, so 4x18650, single emitter design.

Much more reasonable than 1x21700 because the emitter can be driven with ~20A.

Mmm, sorry if late to the party but, how about using a (high CRI) “warm” white emitter? 2700K SST-20 or 2700K LH351D, for example.

That is what i was hoping Simon was going to do, i love my 21700 sbt90 lights, but a 4x18 would be much better! heat handling and power

Or 3x21700, see here:

Hey Barkuti, no problem, it’s always good to hear your 2 cents.
Don’t know, maybe warm white is better. Maybe red… :nerd_face:
I’ve decided to start with yellow since I remember some cars use yellow anti-fog lights. Warm white is typical for old-fashioned bulb lights and for some reason somebody decided yellow will suit better.
But it may also be some other color/wavelength is better (e.g. green or red) but not commonly used due to interference with colors meaning.
Well, first I’m gonna build the light, then we’ll see if any difference can be spotted.

Looking forward for the 4*18A with SBT90 !

Simon confirmed several times there won’t be 4x18 but 3x21 instead

I would be happy with that as well :wink:
My wallet won’t, since i need to buy three new (matching) cells which i need to hold together.
Plenty of 18650’s though