carrot
Flashaholic
My Cree only has three bond wires! :mecry:
Fenix L2D on turbo mode for prolong periods?
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Jarl
Flashlight Enthusiast
I do not have the spec sheets on the CREE XR-E and Lumileds Rebel handy, so I cannot say which can take more current. I know there was a recall on some Rebels; that doesn't mean they are all bad.
For semiconductors, the weakpoint regarding heat is usually the juntion itself, not the bond wires/leads. At high heat you will have increased diffusion (N-type material migrates into P-type and vice versa). When this happens your semiconductor component will no longer work as intended.
How much heat is produced depends on how much power the component is dissipating (voltage drop across the junction multiplied by current). Without good thermal conduction, even a small amount of heat could fry a component. The key to high power semiconductors is effective heat dissipation. It doesn't matter how robust your juntion is; if you can't remove the heat, it will build up and eventually damage/destroy your component.
I have the Fenix pd30 which I left on for 30 minutes accidentally. It was in my basement laying on a table with turbo on. I went to help my dad and forgot that it was on in turbo mode. It was fairly hot, but it still worked fine after I shut it off and let it cool for a while. I didn't see anything wrong after that hapened.
I don't think you have anything to worry about. For most electronics, especially solid state stuff, if something is going to fail, the majority of failures happen very early in their life. Basically, if the part is bad, you will know very soon after buying and using it. With some of my new lights/mods, I will run a fresh battery through them just to make sure it's all good.
That being said, any well built light (defective or not) can be used (or abused) hard enough so it will fail early.
Come to think of it the head on my PD30 is always on tight.
Whenever i turn it on it's on turbo,always use it like that. Sometimes for prolonged periods,never had a problem the lights works as it should.
Honestly i don't know why Fenix would issue this warning.
Other than higher battery drainage there's no problem.
Henk_Lu
Flashlight Enthusiast
For several years? Beware not to reach the 50.000 hours lifespan soon!
I gave mine to a friend 2 days ago who ran it on turbo for an hour or so. I didn't say anything, it was minus 4 degrees celsius outside, where we walked...
SureAddicted
Enlightened
TONY M
Flashlight Enthusiast
Me either! Though I haven't heard of a LD2 Q5... LOL.I didn't realise the LD2 Q5 had been out for several years
He must be using it as a bikelight for commuting or something similar.
I suspect he means the p4 L2D or maybe a different light altogether!
No, I mean the LD2 Q5. I got two from the first batch of them. This is my second year cycling with them with them.....
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Buck
Newly Enlightened
- Joined
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- 141
The difference is that it will not break, unless you hit it with a hammer. That's why you paid twice as much!
Igor Porto
Enlightened
Well I was unimpressed with my L2D Q5 too, and returned it. Good UI? Come on, help me. The L2D has one of the worst UIs I've seen. It doesn't even memorize the last setting, so when you turn it on in the middle of the night you never know if it will turn on high or low or SOS. What a crap.
Jarl
Flashlight Enthusiast
:thinking:
Sorry, run that by me again? You turn it on in the middle of the night and you never know what mode it'll turn on in*? Loosen the bezel, low mode guaranteed, tight bezel, high mode guaranteed. LD01/L0D, medium mode guaranteed. Unlike memory mode lights, which might actually turn on in SOS mode for all you know. Please, if you're going to say you don't like a light, at least use facts to back up your reasoning >.>
*I could say "are you an idiot?" here, but I'm not going to, because that would be borderline trollish, and we don't want that.... :green:
Igor Porto
Enlightened
Well, I'm not even answering to your troll attitude about idiocracy... because trolls do not understand other's opinions.
But yes, I still think the UI is terrible, and that's MY opinion. The one I had didn't turn on in low mode with the bezel loosened, it would turn on in the next level, always. So if I turned it off in medium, when i turned it on again it would be on high.
But yes, I still think the UI is terrible, and that's MY opinion. The one I had didn't turn on in low mode with the bezel loosened, it would turn on in the next level, always. So if I turned it off in medium, when i turned it on again it would be on high.
Jarl
Flashlight Enthusiast
Your light was broken then.... Feel free to say the mfg should have better QC, but please don't say the properly working lights are rubbish because you got an improperly working light.
Igor Porto
Enlightened
Yeah, Fenix should have better QC. I have had 4 of them and they all are different from the other, in throw, spill, color, brightness AND finish. Not good enough for the amount of fame it has around here.
So if I had only one L2D and it was deffective, that's what I will think about it, and others must respect everyone's opinion, like I respect your white wall super beamshot fondness opinion.
So if I had only one L2D and it was deffective, that's what I will think about it, and others must respect everyone's opinion, like I respect your white wall super beamshot fondness opinion.
kts
Enlightened
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Ok..Maybe you should buy a single-level light
Its easy for most people to remember...even in the middle of the night...
tight bezel = bright light
loose bezel = low level :ironic:
Igor Porto
Enlightened
Hehe, that's why both my lights are two-mode only. Tight, bright. Loose-low. It doesn't get better than that.
The only UI I'd like to have is Nitecore, but I don't like the beam, because I like throwers. But another brand which has 3 modes, high-low-custom would be nice. Any suggestions?
The only UI I'd like to have is Nitecore, but I don't like the beam, because I like throwers. But another brand which has 3 modes, high-low-custom would be nice. Any suggestions?
HKJ
Flashaholic
That will only happen if your do a fast off/on cycle, wait a bit and it will always start in low mode.
The TK series from Fenix is two-modes light, high with tight head, low with loosened head.
Marduke
Flashaholic
That tells me you have never actually owned an L2D, and are trashing it because you are a troll. The L2D has NO memory whatsoever, so what you are saying is impossible. There is no explanation of being "faulty" because a light with no memory will not miraculously exhibit the behavior of a light WITH memory.
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