[Closed] Sofirn C01S with Nichia E21A 98CRI R9050/9080

[Agro]

@Lux-Perpetua

@Agro

I would be interested but only if the driver supported 10440.

If we all agree on 10440 this would mean to develop a whole new boost driver, consequently an even higher sales price to cover development costs. Moreover, I’m worried that multichemistry support (1.2/1.5V and 3.7V) will be quite a challenge with such a small driver. Are there any big advantages to expect when driven with a lithium-ion battery? 10440s are much more difficult to source as well as quite expensive. Charging these little suckers in a standard li-ion charger can also become a challenge.

Nearly every AAA driver can work with 10440, this is not a challenge but often an unintended feature.
Even the regular C01S one…sometimes: some users reported that it worked, some burnt theirs.
I suppose it needs some minor tweaks, that’s all required to turn this light from nice but dim to a small hotrod.
Thermal design is fine and IMHO it’s a shame that such omission limited the light’s performance so much.

Dim lights are not my kind of stuff, regardless of how good the beam is, that’s why I requested this feature.

[hodor]

Nice but dim is my type

[Lux-Perpetua]

@Agro

[Nearly every AAA driver can work with 10440, this is not a challenge but often an unintended feature. Even the regular C01S one…sometimes: some users reported that it worked, some burnt theirs. I suppose it needs some minor tweaks, that’s all required to turn this light from nice but dim to a small hotrod. Thermal design is fine and IMHO it’s a shame that such omission limited the light’s performance so much.

Okay, if it's that easy what tweaks are we talking about here? How can a manufacturer make sure that the E21A emitter will not get toasted if someone puts in a brandnew Efest 10440? IIRC, the reason why some C01S did not burn was because they used some low drain and/or partly discharged 10440s. Please don't feel offended by my questions but it would be a complete nightmare for a manufacturer to face returns of defective lights in large scale.

[Ryzbor]

@oweban

If the 5000K option were 4500K I’d be all over all three…

5000K E21A D240 will have a green tint, 4500K E21A d220 will have a nice rosy tint. Choose wisely.

[oweban]

As in, if there were 1800K, 3500K, and 4500K I’d want those three

[Unheard]

I’m in of course. Guess the LED works fine with that driver. 1800K would be very nice, but also too special for mass market. And we know Sofirn has problems sourcing Nichias. More likely they would consider NW tints.

[Muto]

Down for 3, prefer bare aluminum or olive

[Agro]

@Lux-Perpetua

@Agro

[Nearly every AAA driver can work with 10440, this is not a challenge but often an unintended feature. Even the regular C01S one…sometimes: some users reported that it worked, some burnt theirs. I suppose it needs some minor tweaks, that’s all required to turn this light from nice but dim to a small hotrod. Thermal design is fine and IMHO it’s a shame that such omission limited the light’s performance so much.

Okay, if it’s that easy what tweaks are we talking about here?

I don’t know. That’s why I wrote this as a supposition rather than a statement of a fact.

@Lux-Perpetua

How can a manufacturer make sure that the E21A emitter will not get toasted if someone puts in a brandnew Efest 10440? IIRC, the reason why some C01S did not burn was because they used some low drain and/or partly discharged 10440s. Please don’t feel offended by my questions but it would be a complete nightmare for a manufacturer to face returns of defective lights in large scale.

If a LED burns you have a dead light.
If a driver burns you have a dead light.

I don’t see how improving the driver would make the matter any worse, let alone turn it into nightmare.

Now to the also important question, can E21A survive a fully charged, high drain cell? I’m not sure but quick calculations show me that it can’t. Which is a bummer indeed.
I guess few people will care about 10440 support then. Though I still do; even if I kill E21A, a good driver enables me to put some other LED in there. Like SST-20. And I would still have as bright as I’d like.

BTW, there’s one thing to take into consideration when converting a light from SST-20 to E21A. The latter is very flat and may easily have the light emitting surface well below the focal point of the optics.

[mbp]

Would definitely be in for at least one, probably two 3500k and 4500k.

[samyy]

I like the C01S concept, but Im not a fan of the AAAs. So here is my idea: install the C01S driver (maybe with slight improvements) in the bigger body and make the “C10S” - twisty AA light, as small as possible, something in style of DQG Tiny AA or L3 L10…No need of 14500 support, AAs with their higher capacity(comparing with AAAs) would be good enough…

[Tater_Tot]

Interested.

3500k and 4500k would be nice.

The tint should be at or below the BBL, ideally without too much tint shift even with optics.

3-mode UI is good and I personally don’t care for 10440 support.

[skinny_tie]

I’m definitely interested in the lower temperatures, but not the 5000K - if the highest temperature was around 4000K I would probably get that too.

I’m happy with the C01R UI and NiMH support. I’m not interested in 10440 Li-ion support - I wouldn’t mind if it was an option but I wouldn’t want it to compromise NiMH support.

[hodor]

@samyy

…twisty AA light, as small as possible, something in style of DQG Tiny AA or L3 L10…

L3 L10 size and style would be perfect :heart_eyes:

[mitsuki08]

Interested. preferably 4500k below.

[derfyled]

Interested in a 3500-4500k

[staticx57]

interested

[jonxxn]

Definitely interested

[Geoduck]

interested in at least two at 2700-3500k

[Grigio]

Also interested in one of each tint.

[BurningPlayd0h]

Interested if available in 4500K D220 and/or 3000K or below, would definitely pick up both. Don’t care about 10440 support, especially if the driver doesn’t have any stepdowns like the C01S.

A bit more textured/floodier optic vs the C01S is absolutely necessary though. E21A has tint shift through the beam in narrow, untextured TIRs.