742 Torch Lumens! Most beautiful runtime curve. NEOFAB Legion II MC-E review added
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Fooboy
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Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
750 torch lumens ...
So to the human eye it looks twice as bright as a 125 lumen flashlight.
750 torch lumens ...
So to the human eye it looks twice as bright as a 125 lumen flashlight.
neoseikan
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Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Hi. People. Quite happy to see so many of you distribute your advices.
I'd like to explain for the levels setting.
1- Our goal: Top efficiency; Top regulation; Top Robustness.
2- Our trade off: More levels. Because we can not get a satisfying efficiency at lower levels. If we added 50mA, the efficiency will become less than 50%. It's unacceptable. And the driver will loss its robustness.
3- Maybe we can produce a driver, which is stronger than L2's, and still has a low low level, It will cost more room and money. We will try it in future.
Thanks.
Hi. People. Quite happy to see so many of you distribute your advices.
I'd like to explain for the levels setting.
1- Our goal: Top efficiency; Top regulation; Top Robustness.
2- Our trade off: More levels. Because we can not get a satisfying efficiency at lower levels. If we added 50mA, the efficiency will become less than 50%. It's unacceptable. And the driver will loss its robustness.
3- Maybe we can produce a driver, which is stronger than L2's, and still has a low low level, It will cost more room and money. We will try it in future.
Thanks.
Re: NEOFAB Legion II OP/runtime/more pics UPDATED.
Yeah tell that to the many Surefire high output incans that run less than an hour. I can't even grasp the notion that super brightness for 1 hour is useless. That statement only makes sense in the case of an emergency, but I wouldn't necessarily consider the Legion II to be used mainly for emergency purposes.
While I don't mind a few levels, there is a point where it becomes too much and unecessary in my opinion. I think the setup this flashlight has is good, though I do think 100 lumens for the absolute lowest mode is too bright. To me, Luxeon I level performance would be perfect for the lowest level.
Yeah tell that to the many Surefire high output incans that run less than an hour. I can't even grasp the notion that super brightness for 1 hour is useless. That statement only makes sense in the case of an emergency, but I wouldn't necessarily consider the Legion II to be used mainly for emergency purposes.
While I don't mind a few levels, there is a point where it becomes too much and unecessary in my opinion. I think the setup this flashlight has is good, though I do think 100 lumens for the absolute lowest mode is too bright. To me, Luxeon I level performance would be perfect for the lowest level.
Re: NEOFAB Legion II OP/runtime/more pics UPDATED.
I'm not saying this light should be this or that, my point was that it's good to HAVE, just in case. Not that you should focus on this, pick this light for emergency or whatever. Just have the option, IN CASE
I'm not saying this light should be this or that, my point was that it's good to HAVE, just in case. Not that you should focus on this, pick this light for emergency or whatever. Just have the option, IN CASE
TITAN1833
Flashlight Enthusiast
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Guys the talk about this light for emergency use is fine,but really it would never be practicable to rely on the L2 only.My advice is to always have at least two lights"more would be advisable" ready to go,
one able to give full on light when the need arises and one EDC sized light with a very low,low like S2,Novatac Ra clicky or sufefire titan which I might add will run for days or maybe weeks if used sparingly on the lowest setting.
This would keep the L2 for it's purpose lots of lumens when needed and used on max for short bursts should get you through at least a couple of weeks IMO.
(Remember! always carry a back up or two) :twothumbs
Guys the talk about this light for emergency use is fine,but really it would never be practicable to rely on the L2 only.My advice is to always have at least two lights"more would be advisable" ready to go,
one able to give full on light when the need arises and one EDC sized light with a very low,low like S2,Novatac Ra clicky or sufefire titan which I might add will run for days or maybe weeks if used sparingly on the lowest setting.
This would keep the L2 for it's purpose lots of lumens when needed and used on max for short bursts should get you through at least a couple of weeks IMO.
(Remember! always carry a back up or two) :twothumbs
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Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Why do people keep having difficulties grasping the fact that HIGHER DYNAMIC RANGE = LOWER EFFICIENCY?
The higher the difference between the highest and lowest level is, the less efficient the driver will be. That's just the way things work, folks. You can't have the cake and eat it too. It's either-or.
I'd bet there'd be an equal amount of people whining how inefficient the light is if it were the other way around - i.e. if the light did 1 lumen to 750 lumens. Just look at the Arc6 threads.
Why do people keep having difficulties grasping the fact that HIGHER DYNAMIC RANGE = LOWER EFFICIENCY?
The higher the difference between the highest and lowest level is, the less efficient the driver will be. That's just the way things work, folks. You can't have the cake and eat it too. It's either-or.
I'd bet there'd be an equal amount of people whining how inefficient the light is if it were the other way around - i.e. if the light did 1 lumen to 750 lumens. Just look at the Arc6 threads.
Ryanrpm
Enlightened
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Not to go too far off topic, but those lights out there that specialize in Infinite brightness levels, would they fall under the same category?
Not to go too far off topic, but those lights out there that specialize in Infinite brightness levels, would they fall under the same category?
AardvarkSagus
Flashlight Enthusiast
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
I personally am surprised at how many people here on this forum are looking at a high end light like this and contemplating how useful it would be if it was the only light they owned. How many people are going to choose one of these 30 high end premium collectors edition lights as a first and only flashlight? None of you actually have no other lights to choose from. I wonder why this light is not allowed to be a specialized unique piece instead of having to be all things to all people? I prefer to have a number of lights that cover different tasks, I don't use a flat head screwdriver to loosen my lug nuts. I like to be able to choose the proper tool for the specific task at hand. Each of my lights has their own specific area of expertise. If I could afford this light it would not be taking the place of my Coast LED Lenser dual output red 5mm for night time treks to the thermostat. Even if it did have a half lumen low mode.
I personally am surprised at how many people here on this forum are looking at a high end light like this and contemplating how useful it would be if it was the only light they owned. How many people are going to choose one of these 30 high end premium collectors edition lights as a first and only flashlight? None of you actually have no other lights to choose from. I wonder why this light is not allowed to be a specialized unique piece instead of having to be all things to all people? I prefer to have a number of lights that cover different tasks, I don't use a flat head screwdriver to loosen my lug nuts. I like to be able to choose the proper tool for the specific task at hand. Each of my lights has their own specific area of expertise. If I could afford this light it would not be taking the place of my Coast LED Lenser dual output red 5mm for night time treks to the thermostat. Even if it did have a half lumen low mode.
TITAN1833
Flashlight Enthusiast
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
I agree with orcinus and AardvarkSagus 100% and another reason this light would not be my first choice when trekking to the bathroom at night,imagine dropping the L2 on your bare little toes
ouch!!
No thanks!I have smaller and lighter ones for that task,and I will still walk the next day should I have a dropping accident :laughing:
I agree with orcinus and AardvarkSagus 100% and another reason this light would not be my first choice when trekking to the bathroom at night,imagine dropping the L2 on your bare little toes
ouch!!No thanks!I have smaller and lighter ones for that task,and I will still walk the next day should I have a dropping accident :laughing:
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HKJ
Flashaholic
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
I do not understand that. The current consumption of the circuit may give a low efficiency at low level, but the efficiency at the high levels does not have to be effected, at least not in any significant way.
I do not understand that. The current consumption of the circuit may give a low efficiency at low level, but the efficiency at the high levels does not have to be effected, at least not in any significant way.
wbp
Enlightened
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Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Ouch is right! Given the weight and the bezel, you're likely to lose a toe!:eeksign:
I agree with orcinus and AardvarkSagus 100% and another reason this light would not be my first choice when trekking to the bathroom at night,imagine dropping the L2 on your bare little toes
Ouch is right! Given the weight and the bezel, you're likely to lose a toe!:eeksign:
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Probably because nobody has ever heard of such a concept... I've been reading CPF for a long time (didn't start posting till more recently) and I've never heard mention of this idea.
I'm not an EE, but I'm pretty good with math and physics and I can think of no reason why this would be universally true. I've seen efficient lights with a large dynamic range and (more commonly) inefficient lights with a small dynamic range.
Can you provide a scientific basis for this theory?
Probably because nobody has ever heard of such a concept... I've been reading CPF for a long time (didn't start posting till more recently) and I've never heard mention of this idea.
I'm not an EE, but I'm pretty good with math and physics and I can think of no reason why this would be universally true. I've seen efficient lights with a large dynamic range and (more commonly) inefficient lights with a small dynamic range.
Can you provide a scientific basis for this theory?
wbp
Enlightened
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Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
This light was designed to be efficient at high output, which is why there are 3 cells in series powering it. As you lower the drive current to the LED, the efficiency will go down, due to losses in the driver circuitry. Even a small amount of dissipation in the driver becomes more and more significant as the voltage across the driver increases. The math (and physics) are not very complicated here.
This light was designed to be efficient at high output, which is why there are 3 cells in series powering it. As you lower the drive current to the LED, the efficiency will go down, due to losses in the driver circuitry. Even a small amount of dissipation in the driver becomes more and more significant as the voltage across the driver increases. The math (and physics) are not very complicated here.
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
So a light that uses (for instance) a single 1.5v cell and boosts for high drive current would be efficient at low levels, but not higher levels, whereas a light that uses 3 li-ion cells and a buck circuit would be efficient at high levels, but not low?
Or am I misunderstanding?
So a light that uses (for instance) a single 1.5v cell and boosts for high drive current would be efficient at low levels, but not higher levels, whereas a light that uses 3 li-ion cells and a buck circuit would be efficient at high levels, but not low?
Or am I misunderstanding?
TITAN1833
Flashlight Enthusiast
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Hey guys?
If it's so easy where are all the high powered MC-E/ P7 that have a 1 lumen or less low and ranges up to and beyond 500 lumens,I don't see any and I doubt you will see one any time soon :devil:
Hey guys?
If it's so easy where are all the high powered MC-E/ P7 that have a 1 lumen or less low and ranges up to and beyond 500 lumens,I don't see any and I doubt you will see one any time soon :devil:
HKJ
Flashaholic
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
It is easy enough to make, but the manufacturers do probably not believe we want it.
How easy it is to make will depend on the circuit used and it might increase the cost a little bit. Looking at energy consumption it might also be pointless to make it, because the control circuit might use more energy than the led at low power levels.
It is easy enough to make, but the manufacturers do probably not believe we want it.
How easy it is to make will depend on the circuit used and it might increase the cost a little bit. Looking at energy consumption it might also be pointless to make it, because the control circuit might use more energy than the led at low power levels.
TITAN1833
Flashlight Enthusiast
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Exactly! therefore it would be pointless at this time to add a 1 lumen level for the sake of efficiency IMHO
PhantomPhoton
Flashlight Enthusiast
Re: 742 Torch Lumens! NEOFAB Legion II UPDATED.
Yes, in general I agree. But there's an incredibly simple solution to that... it's sad that manufacturers haven't figured it out yet.
Yes, in general I agree. But there's an incredibly simple solution to that... it's sad that manufacturers haven't figured it out yet.
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