18650 light with full regulation

Hi all,
we discussed in dealers forum about full regulated 18650 lights http://www.cpfmarketplace.com/mp/showthread.php?p=2208251#post2208251 )
and I ask me, which lights are have this.
I own the follow lights with good regulation from 3-4,2 Volt:
Raidfire Spear,
Dereelight (3SD )
L-Mini (not perfect but good for the price)

do you know other lights with constant output at one cell LiIon??



Jens

Jetbeam JET III Pro I.B.S. is fully regulated, too.

However, fully regulated always leads to low efficiency. So that's the problem.

fineday said:

Jetbeam JET III Pro I.B.S. is fully regulated, too.

However, fully regulated always leads to low efficiency. So that's the problem.

Click to expand...

that's the question, what's high efficiency?, very long runtime with lower output after some minutes or shorter runtimes with full output to the last minute...???

If HDS ever releases the vaporware 18650 tube for the Ra Twisty... you could add it to your list.
I'm not sure if a Malkoff M30 has completely flat regulation as well.

Fineday, I'm not sure what you mean by a fully regulated light means "low efficiency"... Care to elaborate?

ichoderso said:

that's the question, what's high efficiency?, very long runtime with lower output after some minutes or shorter runtimes with full output to the last minute...???

Click to expand...

I think the difference between "high efficiency" and "high effectiveness" may be being missed here. It seems to me that high efficiency is synonymous with lowest possible loss, while high effectiveness may accept some loss to achieve a given purpose......... no?

ichoderso said:

that's the question, what's high efficiency?, very long runtime with lower output after some minutes or shorter runtimes with full output to the last minute...???

Click to expand...

Sorry that I'm not good at English and may make some misunderstanding

Well...my "high efficiency" does mean that how much energy the circuit got from the battery will finally be delivered to the LED. For example, if the circuit gets 5 Watt from the battery but only delivers 3 Watt to the LED, the circuit may be "low efficiency".

By the way, if so, how should I express that phenomenon?

fineday said:

Sorry that I'm not good at English and may make some misunderstanding

Well...my "high efficiency" does mean that how much energy the circuit got from the battery will finally be delivered to the LED. For example, if the circuit gets 5 Watt from the battery but only delivers 3 Watt to the LED, the circuit may be "low efficiency".

By the way, if so, how should I express that phenomenon?

Click to expand...

There's no reason a fully regulated light should be any more or less efficient than an semi-regulated light. The semi-regulated light will have more runtime, but that's because it's brightness drops off quickly, so draws less power.

But boost regulation is less efficient than buck or direct drive.

Jarl said:

There's no reason a fully regulated light should be any more or less efficient than an semi-regulated light. The semi-regulated light will have more runtime, but that's because it's brightness drops off quickly, so draws less power.

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+1

Very well said.

The Trustfire TR-801 is, I think, regulated.

Fineday, your description of efficiency is correct. Less wasted energy equals greater efficiency.

Depending upon one's needs, a smaller 80% efficient light may be more desirable than a larger light with more cells and a buck circuit and 95% efficiency. The reverse may also be true; it all depends.

Fallingwater said:

The Trustfire TR-801 is, I think, regulated.

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it is not. it has amc7135 driver.

Fallingwater said:

The Trustfire TR-801 is, I think, regulated.

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AMC7135, so sort of

PS: I love mine because I love how the AMC7135 drivers work with 18650.

What sort of driver is the AMC? Semiregulated?

Edit: we are talking about the 5-mode one, yes?

jirik_cz said:

it is not. it has amc7135 driver.

Click to expand...

LukeA said:

AMC7135, so sort of

PS: I love mine because I love how the AMC7135 drivers work with 18650.

Click to expand...

Both versions (1 and 5 mode) of the Trustfire TR-801 has the AMC7135 driver?

Flashfirstask?later said:

Both versions (1 and 5 mode) of the Trustfire TR-801 has the AMC7135 driver?

Click to expand...

One mode: definitively yes. Five-mode: I don't know, I don't own one.

Fallingwater said:

What sort of driver is the AMC? Semiregulated?

Edit: we are talking about the 5-mode one, yes?

Click to expand...

I think that both are AMC7135 based.

AMC7135 is a linear regulator. Voltage higher than LED Vf is dropped and dissipated as heat.

To stay at regulation it needs battery voltage higher than LED Vf+0.12V.

Cree XR-E at 1A has LED Vf=3.7V
So you need at least 3.82V. But if you consider some contact resistance and battery voltage sag it will stay in regulation only for a short time with one li-ion.

Personally I like them, they have very high efficiency with one li-ion.

It's not a flashlight, but the R2 Wolf-Eyes Drop-in I have is fully regulated on Li-ion batteries. It isn't on primaries though.

DereeLight has the CL1H, and a nice selection of D26 modules for it (and many other possible hosts) that are fully regulated on an 18650. Also the DBS is available with pills that are optimized with 18650s in mind.

A lumapower D-mini with a D65 extention tube should also be nicely regulated on an 18650. IMO it would make a nice conservative setup where absolute maximum output isn't the main goal, but rather, something that delivers a plenty useful amount of light, with constant output, for hours.

The tiablo A8 had very flat regulation on an 18650, but I don't know what happened to the A8- seems to have disappeared from most dealer pages.

The Jetbeam 18650 lights are all dedicated 18650 designs that will maintain good regulation.

I love my Pila GL2. Is WAY underated. It takes 18650 and comes with its own Cree module. They have a new 250 lumes or around that. I have been always a fan of 18650 as opposed to the small R123 rechargeables. These days pretty much all Cree modules are bright enough. With the batteries AW 18650 and with the Pila charger has been working great for me. I really think the Pila is as good as Surefire, Streamlight, etc. is just they are not as popular. The newest Pila GL2 is a great host for the 18650 and P60 type dropin. I think the newest Gene modules may work even better with the 18650 as they need less voltage.

I have tried the Deerlight but did not do much for me. Sold it.

I have not tried the Fenix or the Jetbeam 18650 products. I may in the future.

Chris