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Topic ClosedLED meltdown
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Bill-GA View Drop Down
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Posts: 214 		Direct Link To This Post Topic: LED meltdown
    Posted: 12 Jun 2013 at 10:04am
I found this page with lots of raw LED info.


Interestingly at the bottom of this link, under heat dissipation, it says when an LED is installed and the temperature is expected to exceed 60C, then a forced air circulation method must be provided.

Also, DO NOT LOOK closely at high intensity LED's as they could damage eye sight.

I may purchase ONE glass LED Panel just to see what it's characteristics are - out of curiosity.

Bottom line - when you buy stuff from China with no docs, your on your own (as has been said many times here).
Bill & Bev
13 yr old dachshund 'Elsa'
2010 RP-176T (tent & slide-out)
2011 Toyota Tundra 2WD TV
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Bill-GA View Drop Down
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Posts: 214 		Direct Link To This Post Posted: 11 Jun 2013 at 11:09pm
There seems to be FOUR TYPES of LEDS being sold (on EBay). Larger 5050, smaller 1210, small hi-intensity 3528 and then there's what looks like a panel of small glass covered LED's that are just called 'LED's'. Of course there's very little doc about lumens, watts, heat, etc

Here a link which offers 'type' selection...

I am NOT recommending this seller, just using it as an example. My 48 LED panel has the type 3528 (I think) which is VERY hot ... Thus my meltdown.

Is there an LED place to go to make sense of this all? I know folks have express likes for various products ... but I'm looking for info on LED's.
Bill & Bev
13 yr old dachshund 'Elsa'
2010 RP-176T (tent & slide-out)
2011 Toyota Tundra 2WD TV
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Outbound View Drop Down
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Joined: 19 Nov 2009
Location: Oshawa, Ontario
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Posts: 767 		Direct Link To This Post Posted: 06 Jun 2013 at 9:03pm
Warm white 1210 SMDs put out 6-8 lumens
Craig :: 2009 RP171 towed by a 2017 F150
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Anthony Valenzano View Drop Down
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Posts: 44 		Direct Link To This Post Posted: 06 Jun 2013 at 9:11am
Don't waste your money on that. More LEDs do not equal more light - you can get all the light you need out of one good LED. What is limiting the amount of light is the surface area for dissipating heat. Every LED is about 70-100 lumens per watt. In other words more heat equals more light. If that heat isn't dissipated then more heat equal less life or meltdown. Search for a bulb that looks like it can dissipate heat and pick that one. For my rig I picked this one.

http://www.homedepot.com/p/Philips-3-Watt-10W-T3-LED-Landscape-Capsule-Cool-White-4100K-Light-Bulb-407998/202514337#.UbCI_pzD_ng

Its 2.5W and 100 lumens which means they aren't lying. It uses the ceramic to dissipate the heat, but still gets warm. I measure the light output and its 20% more or so than the stock incandescent. I did put a bit of aluminum tape behind these to reflect the light down.
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Bill-GA View Drop Down
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Posts: 214 		Direct Link To This Post Posted: 06 Jun 2013 at 8:39am
Here's a 24 LED version 
Of the circular wedge light. Same seller. Still no lumens data. About the same price.

More LEDs ...  More heat?
Bill & Bev
13 yr old dachshund 'Elsa'
2010 RP-176T (tent & slide-out)
2011 Toyota Tundra 2WD TV
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Joined: 25 Jul 2011
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Posts: 6128 		Direct Link To This Post Posted: 05 Jun 2013 at 9:13am
I think the sticky pads that the OP's were shipped with are just junk. We used the same, and several of the sticky pads looked all curled up and meltish... without that particular light ever being turned on.

I went through and switched out to small strips of real 3m trim tape. It holds bumpers on cars at all temps and conditions.. our LED's have been stuck up there just fine since. Also since I just used small strips along the outside edge, they get some air circulation behind/under. I think.
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kymooses View Drop Down
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Posts: 1807 		Direct Link To This Post Posted: 05 Jun 2013 at 9:11am
Originally posted by Outbound

Originally posted by kymooses

Do you all feel that they dissipate heat well enough or that they don't get too hot?

They do get very warm (not "hot" and nowhere near "burning").  They're certainly cooler than the stock bulbs.  Because they sit proud (i.e. not taped to the light fixture), it does allow air to circulate around the bulb.

Thanks!!  Cooler than stock bulbs is exactly what I wanted to hear!
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Anthony Valenzano View Drop Down
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Posts: 44 		Direct Link To This Post Posted: 05 Jun 2013 at 6:48am
That's what they seem to be doing for the LED fixtures - Just drilling a big hole.
 
http://www.amazon.com/Gold-Stars-F3528001-Fixture-Natural/dp/B00CZCY5SE/ref=sr_1_25?ie=UTF8&qid=1370429070&sr=8-25&keywords=Led+Rv+Interior+Light+Fixtures
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Bill-GA View Drop Down
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Posts: 214 		Direct Link To This Post Posted: 04 Jun 2013 at 9:15pm
Has anyone tried drilling small vent holes (very carefully) in the light lenses.  I'm not sure if it would help ... or even be possible. Do they sell replacement lenses?
Bill & Bev
13 yr old dachshund 'Elsa'
2010 RP-176T (tent & slide-out)
2011 Toyota Tundra 2WD TV
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Bill-GA View Drop Down
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Posts: 214 		Direct Link To This Post Posted: 04 Jun 2013 at 7:21pm
Originally posted by Outbound

Anyway, here's a current listing (link).  This is the same seller I bought from and the same item.  As I said, I've had them for over a year and they've been fantastic - all bulbs still work 100%.  At less than $30 for 10 of them, I was willing to try them and lose the money if they didn't work out (my philosophy for buying anything off of eBay); fortunately, they did work quite well.
Outbound,

The price & color is right ... Hoping the lumens are enough for what I want.  I gotta get rid of the 48 LED panels before something happens. Thanks for the link.  Bill
Bill & Bev
13 yr old dachshund 'Elsa'
2010 RP-176T (tent & slide-out)
2011 Toyota Tundra 2WD TV
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