about lamp regulation

[crislight01]

for not longtime i've been using a regulated lamp : the fenix L2D CE, is it normal that after some hours of use(what i expect from my ni-mh) the lamp shuts down in a drastic manner?(just see a little bit of luminosity coming out of the led), is that the way a regulated lamp shuts down???

 

[crislight01]

funny now those same batts got the lamp full working....:thinking:, bad connection in the fenix body? as i said the cree bin looked completely dim ,i could look at it without having my eyes in pain.

 

[crislight01]

Now the bin has almost gone out but in a progressive way so it was the batts, it's nice now if you look at the cree led you can see its diagrams(it's just like glowing but not shinning), nice!:huh:

 

[Illum]

never heard of this as an issue with the fenix lights but some lights do have thermal shutdown/stepdown function that limits the current to the LED when the unit becomes too hot

first of all....what type of cells are you using?

I remembered seeing runtime charts similar to what you meant "drastic decrease in output" when RCR123A was tested...I don't remember if it was Fenix or not

AFAIK, its a contact issue...and fenix lights are very very sensitive to even a little dab of lubricant on the conducting plates

 

[fineday]

Sorry I can't understand you very well but, do you mean the circuit keeps the same output level for almost all the time and suddenly shut down when battery low?

Some circuits do work in that way like old INOVA XO, and I remembered Fenix L2 series also uses that kind of circuit. So what you've said is normal.

And for things in #2 and #3, that's caused by the resistance of the battery(I know resistor but is that effect called resistance?). When the battery gets low, the resistance of itself will go greater, so more power will turn to heat by the battery self and the output voltage will get lower and lower until the circuit can't work. But if you leave it alone for a period of time, the resistance will once again turn back to low level, in that case, if you turn on your light, it will be bright for a short time and quickly get dim again.

 

[crislight01]

, in that case, if you turn on your light, it will be bright for a short time and quickly get dim again.

yes true! this is what i just noticed, as for fenix lights yes they seem very sensitive to contacts, one thing i noticed on my L2D CE is if you press the head down(for whatever reason) the light will be blocked in turbo mode (whatever you do turning the bezel etc..) it will stay blocked in turbo mode , the solution is to open the body get the batts out and reput them(this must be contact sensitivity), as for batts i'm using duracell NI-mh 2,65 Ah and Powerex 2,7Ah

 

[Gunner12]

Well, since the L2D-CE has a regulator circuit, it will run at full or close to full brightness until the batteries give out, then it should drop to a much lower output "moon mode".

 

[crislight01]

one thing i noticed on my L2D CE is if you press the head down(for whatever reason) the light will be blocked in turbo mode (whatever you do turning the bezel etc..) it will stay blocked in turbo mode , the solution is to open the body get the batts out and reput them(this must be contact sensitivity)

now i discovered this happens if you dont turn enough the head to get in low mode, if you just turn a little bit you will get in low mode but if at this stage you press the head down the block state will/can happen.

 

[yellow]

what is the point?

When the body touches the inner ring, then the turbo mode is activated,
when the head is unscrewed just a bit and then a push on the head moves it enough to make contact again, then turbo mode is activated again

A Miracle?

 

[crislight01]

what is the point?

When the body touches the inner ring, then the turbo mode is activated,
when the head is unscrewed just a bit and then a push on the head moves it enough to make contact again, then turbo mode is activated again

A Miracle?

no, not a miracle just something good to know when you use the flashlight in a non comon place where rescues can arrive but only after 2 or 3 days.
It's always good to know your tool.
btw i was talking about a blocked turbo state so please dont misinterprete my words.