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Topic ClosedLED meltdown

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Anthony Valenzano View Drop Down
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Direct Link To This Post Topic: LED meltdown
    Posted: 01 Jun 2013 at 10:00pm
LEDs indeed get warm, or aren't putting out much light and if they get hot they will fail very soon. Life of the LED is inversely proportional to running temperature, so a reputable LED manufacture will ensure the proper heat sinking path and Airflow. Really we shouldn't use a LED bulb, but a replacement LED fixture as LEDs need airflow and incandescent fixtures tend to restrict airflow.
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Bill-GA View Drop Down
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Direct Link To This Post Posted: 01 Jun 2013 at 10:00pm
Marwayne/Outbound,  what's the nomenclature for the round 9 LED you are using? I'm trying to locate it online to measure its output in lumens. Thanks, Bill
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Direct Link To This Post Posted: 01 Jun 2013 at 10:20pm
Originally posted by techntrek

Goose, even LEDs produce heat, and unlike in incandescent lights the waste heat is a big LED killer.  If you ever buy a LED light for your house (to replace a standard light bulb) you'll see they come with big heat sinks to keep them cool. 


Techntrek, last month I purchased 3 interior LED flood light bulbs (60/75 watt equivalent) in Costco which replaced 3 indoor incandescent flood lights.  I was concerned about heat in an IC recessed fixture. New bulb was totally glass enclosed (cost about $20+ US) and I was VERY impressed that it did NOT run very hot. Dimable too.

I don't know if this is new technology or just packaging technology. Have you seen these?

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Direct Link To This Post Posted: 01 Jun 2013 at 10:55pm
 
 
 

 

Technical specs:

  • LEDs: 9 Triple Chip SMD LEDs
  • Base: T10 Wedge
  • Size: 29 X 6 mm
  • Light Spread: 120 degree
  • Wattage: 1.4 watts
  • Voltage: 11-15V DC
  • Lumens: 140 lumens
  • CRI: 80 - 85
  • Colour Options: Warm White 3000K, Cool White 6000K
  • Replaces: 15W Halogen
  • Warranty: 2-year replacement
  • Environmental: No Mercury, Lead Free, UV Free
If you want something done right, do it yourself.
2011 RP172, 2016 Tundra 5.7 Litre, Ltd.


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Direct Link To This Post Posted: 02 Jun 2013 at 12:52am
Actually, mine have 12 x 5050 SMDs


Color: 2850k
Voltage: 11-15 V DC
Wattage: 2 watts
Lumens: 220



Craig :: 2009 RP171 towed by a 2017 F150
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Direct Link To This Post Posted: 02 Jun 2013 at 3:56pm
Originally posted by Bill-GA

Originally posted by techntrek

Goose, even LEDs produce heat, and unlike in incandescent lights the waste heat is a big LED killer.  If you ever buy a LED light for your house (to replace a standard light bulb) you'll see they come with big heat sinks to keep them cool. 


Techntrek, last month I purchased 3 interior LED flood light bulbs (60/75 watt equivalent) in Costco which replaced 3 indoor incandescent flood lights.  I was concerned about heat in an IC recessed fixture. New bulb was totally glass enclosed (cost about $20+ US) and I was VERY impressed that it did NOT run very hot. Dimable too.

I don't know if this is new technology or just packaging technology. Have you seen these?

I've seen enclosed "bulbs" for the lower wattages but not at that level, interesting.

Doug ~ '10 171 (2009-2015) ~ 2008 Salem ~ Pod instruction manual
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Direct Link To This Post Posted: 03 Jun 2013 at 8:18am
I'm sure it's as simple as it's really a lower power bulb.  I've seen those and they are only about 3 watts, which is low enough to dissipate through the bulb base and the bulb glass.  
As far as I've seen LED bulbs fall into one of three categories:
1.) Low power and low light - never really heat up, will last a long time (25K hours) and inexpensive.
2.) Higher power, lots of light, with aluminium or ceramic to dissipate heat, expensive, but last 50K-100K hours - basically properly engineered.
3.) Lots of light w/ no heat sink, basically a cheap knock off that will burn up fairly soon (soon being 1000 hours usually)

I design circuitry for LED fixtures, there's no magic - just these trades. 
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Direct Link To This Post Posted: 04 Jun 2013 at 9:57am
@Outbound and @Marwayne

Do the ones you all have.  I'm just calling them pancake style cause they are flat like that.  Do you all feel that they dissipate heat well enough or that they don't get too hot?

I've read that they don't do a great job of dissipating heat and so I was looking at the type that is a rounded cylinder type on a ceramic base.


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Direct Link To This Post Posted: 04 Jun 2013 at 10:36am
Thanks Doug for the info, I have a couple of LED's in the house and very happy with the output and they do have heat sinks around them. The ones that I just put in have a G10 base in a track light with no heat sinks so with the info that Anthony provided we will see how long that they last.
I am sitting on the fence when it comes to the lights in the POD, I have not decided to go with the "pancake style" like Marwayne and Outbound or the "tower style" that puts light 360 degrees and makes a little better use of the design of the light fixture.   Goose
Mother Goose's Caboose..2011 RP171..07 Grand Cherokee
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Direct Link To This Post Posted: 04 Jun 2013 at 12:38pm
Outbound,
 
Where did you get the 12 SMD lights?  What is the catalog number?  I would like to get some of those!
 
Thanks
 
Todd
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