L4 getting hot ?

hey - just wondering if running my L4 for extended periods without my hand holding the head (to keep it cool) will damage the light ?
reason i ask - my girlfriend borrowed my L4 when she went to bring her cat inside and held it near the switch - it would have been on for at least 10 mins
thanks

I know that they get hot, but I don't think that anything will fry. I ran mine taped to the fender of my dirt bike till the batt went dead and changed batts and ran it some more. It was fine.

The L4 should be fine... it may heat up quite a bit but shouldn't suffer any damage to the light or electronics.

-Mike

It is suitable for extended constant-on use but it is a flashlight and will get hot. There is no data I'm aware of that points to such usage being damaging.

Al

I thought running Luxeons at high temperatures speeds up their aging?

mark 2 - thats why i was asking
everyone else - thanks for the help
ill stop worrying now

10Minutes constant on isn't a time frame I would worry about. /ubbthreads/images/graemlins/icon3.gif

My L4 ran for this long and seems ok! /ubbthreads/images/graemlins/smile.gif

The Luxeons don't fail, they just become dimmer over time.

Yes, but not for several thousands of hours heavy (hot) use.

Al

OMG Roy! It's right there in the graph, the temperature killed it after approximately 1:20 hours. /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/wink.gif

/ubbthreads/images/graemlins/clap.gif /ubbthreads/images/graemlins/crackup.gif /ubbthreads/images/graemlins/happy14.gif /ubbthreads/images/graemlins/crackup.gif

Now that's funny... /ubbthreads/images/graemlins/smile.gif

Tom

[ QUOTE ]
Size15s said:
Yes, but not for several thousands of hours heavy (hot) use.

Al

[/ QUOTE ]

I thought it was more like 500 hours? /ubbthreads/images/graemlins/thinking.gif

Peter

I think its 500 hours to 50%???

That was old research data prior to release of the Luxeons by LumiLeds. It wasn't based on the product they have been producing, and isn't based on the way the product is being used in this application.
If it was 500 hours, surely somebody would have run a KL4 off a bench supply for a month and been able to measure a difference right? It appears to me that CPF Members may like to talk a lot and try to scare each other but nobody here really cares enough to be bothered to try find the fire behind this smoke or whether it's just fog.

It's like we tell each other the world is flat and yet we don't bother to actually go look for ourselves...

Al

thanks for the help guys i will try to keep it cool but if i cant i wont worry anymore

[ QUOTE ]
Size15s said:
That was old research data prior to release of the Luxeons by LumiLeds...

[/ QUOTE ]I thought that applied to "portable" 5watters ?



[ QUOTE ]
03lab said:
OMG Roy! It's right there in the graph, the temperature killed it after approximately 1:20 hours. /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/wink.gif

[/ QUOTE ]

LOL!

Brightnorm

[ QUOTE ]
Size15s said:

It's like we tell each other the world is flat and yet we don't bother to actually go look for ourselves...

Al

[/ QUOTE ]

Are you saying it's not flat /ubbthreads/images/graemlins/wink.gif

Edited to add: "The facts are simple," says Charles K. Johnson, president of the International Flat Earth Research Society. "The earth is flat."

/ubbthreads/images/graemlins/crackup.gif

[ QUOTE ]
03lab said:
OMG Roy! It's right there in the graph, the temperature killed it after approximately 1:20 hours. /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/wink.gif

[/ QUOTE ]

/ubbthreads/images/graemlins/crackup.gif

You guy's are killing me.....