Is it true the L2D CE Q5 comes with a warning if you keep the 180 lumens on?

[LED Flashlights.]

I heard if you keep the 180 lumens on the Fenix CE Q5 for atleast 10 minutes.

It's not recommend for the light because it could damage the light.

And, if that is true.

What is the highest amount of lumens for this to be true?

Is it anything over 100 lumens or even lower lumens?

 

[WadeF]

They only say this is a problem when you are in high ambient temperatures, but they don't specify what counts as high ambient temperatures.

For me personally I don't like to let any of my high output lights run for a long time if they aren't in my hand.

 

[LED Flashlights.]

Thanks, so, if I lefted my L2D CE on for 4 hours at 80 lumens would that be OK?

I've lefted my L2S on for 4 hours once at 45 lumens until the batteries went out.

How about that?

Is 45 or 80 lumens considered high output lights?

 

[StarHalo]

The high output they're referring to has to do with how hard you're driving the LED - there's only so much mass in a thin flashlight to provide heatsinking, so if you run the LED at its upper limits for a while, it will eventually melt itself. This would be the "Turbo" mode on Fenix lights.

You can leave it on Turbo indefinitely so long as there's your hand on or cool air flowing over the flashlight.

The lower output modes aren't near the LED's thresholds, so you can use them as long as you like under any conditions.

 

[LED Flashlights.]

Thanks.

So, the turbo mode should only be used if you really need it.

 

[Marduke]

The turbo mode can be used as long as you want whenever you want if you use the light in a normal mode of operation, meaning you either have your hand on it for heatsinking, there is airflow over it, or the ambient temperatures are not particularly high.