Based on the data sheets and research the cree XP-G LEDs will run for 19 years at 153 degree. said:Do realize that that would be inside of a controlled laboratory setting, with an ambient temp of 77*F. [smilie=wink.gif] That said.... 105*F is fine.
Cheers,
[I]@niteowl03 wrote:[/I][quote="Based on the data sheets and research the cree XP-G LEDs will run for 19 years at 153 degree. said:Do realize that that would be inside of a controlled laboratory setting, with an ambient temp of 77*F. [smilie=wink.gif] That said.... 105*F is fine.
Cheers,"]
77degrees is pretty cool for any electrical fixture running this much juice through it.....ive never seen or heard of this particular stat.......where can I find this information? Thanks in advance.
In comparrison said:HOTT DAM!!!!! [smilie=thinking.gif] thats some warm stuff.
I actually, oddly enough have my fan over my LED's hooked up to my fan controler in my computer. Ill post pics later tonight, I need to run an ext wire from the controler for the temp probe so that I can program the controler to respond accordingly. very handy if you have the setup near a tank.
[I]@bimmerzs wrote:[/I][quote="[I]@niteowl03 wrote:[/I][quote="Based on the data sheets and research the cree XP-G LEDs will run for 19 years at 153 degree. said:Do realize that that would be inside of a controlled laboratory setting, with an ambient temp of 77*F. [smilie=wink.gif] That said.... 105*F is fine.
Cheers,"]
77degrees is pretty cool for any electrical fixture running this much juice through it.....ive never seen or heard of this particular stat.......where can I find this information? Thanks in advance."]
Pretty much every led manufacture base their output spec's on the junction temp, we can go into an extremem amount of detail on this but it is much easier to reference the data sheets. The aquastyle uses the bridgelux led's but most led manufactures test under similar lab conditions and not real world condition's. The below graph is from a bridgelux datasheet and shows the led's are running at 350ma with a juction temp of 25*C/77*F. The actual light output is not important for this example but will show you that if you had these same led's running at 700ma then that junction temp would get pretty high and shorten the life and output characteristic's of the led. You can extrapolate this across every led out there including cree's, running the led's at higher current's/forward voltages equals more heat and shorter life. When you start cranking up the current to led's and then run into a cooling issue either with the led fixture etc or the room temp, then you can get into issues.
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Cheers,
[I]@bimmerzs wrote:[/I][quote="[I]@niteowl03 wrote:[/I][quote="Based on the data sheets and research the cree XP-G LEDs will run for 19 years at 153 degree. said:Do realize that that would be inside of a controlled laboratory setting, with an ambient temp of 77*F. [smilie=wink.gif] That said.... 105*F is fine.
Cheers,"]
77degrees is pretty cool for any electrical fixture running this much juice through it.....ive never seen or heard of this particular stat.......where can I find this information? Thanks in advance."]
The info is in the data sheets, I can help you find it if you like. Here's from the Cree XP-G datasheet, now everybody know's most people run their cree's at 1000ma but looking at the datasheet, all you will see is info based on 350ma. The cheap fixtures with several loud running fan's are there to help overcome the lack of effective heat management. http://www.cree.com/products/pdf/xlampxp-g.pdf
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Cheers,