LED lights getting hot and burning out??

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Philsuma
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LED lights getting hot and burning out??

Postby Philsuma » Sun Mar 15, 2015 2:26 pm

Anyone with 'over heat' experience with LED's please post.

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LED lights getting hot and burning out??

Postby zonz540 » Mon Mar 16, 2015 11:13 pm

I've had two JD 13W fixtures burn up. I've since replaced the drivers and am currently using them.
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Re: LED lights getting hot and burning out??

Postby joneill809 » Mon Mar 16, 2015 11:49 pm

I have 19 JD's (mixture of 9, 11, 13 and 17) and 5 G&G. Of those, I have not lost a bulb, though one lamp seems to have a few defective diodes. Overall they have performed well, but every hood I have them in is actively vented so I get good airflow. I've never kept them in a passively vented hood. The oldest bulbs I have are about 2.5 years old.

I had some early LYR light bars that burned out at a high clip. I worked with Todd to get them replaced, but I think they were eventually discontinued.
Jim from Austin please contact me if you are willing to trade offspring from:
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LED lights getting hot and burning out??

Postby zonz540 » Tue Mar 17, 2015 4:05 am

Actively cooling LEDs is a sure fire way to extend their life. Unfortunately for my bulbs, I refuse to put 12V fans into all of my Exo hoods.
The newer bulbs are vented on the ends, allowing for some additional thermal diffusion. I'd imagine this likely (hopefully) brings the temps of the drivers down to a safer point that doesn't require forced air flow for extended service.
I've noticed on mine that the diodes are solid. I'm yet to see one burn out in the years I've had them. The drivers are where I've seen them overheat and die an untimely death. I even had one start on fire inside of its Aluminum housing...
Overall, I really like the Jungle Dawn and Glow & Grow bulbs and Todd has been excellent to work with. I'll be ordering several more in the next couple of weeks. I just think it took some time and a few failed bulbs to get the design where it needed to go from its conception. If there were a way to utilize the massive thermal relief the case is capable of providing when used as a sink, I feel that would be the greatest step towards a long term solution for heat dissipation.
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Re: LED lights getting hot and burning out??

Postby Philsuma » Tue Mar 17, 2015 8:45 am

It's funny (to me anyway) that the very reason to switch over to these bulbs-less heat, and you STILL have to worry about overheating.

I guess more like, ironic ?

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Re: LED lights getting hot and burning out??

Postby zonz540 » Tue Mar 17, 2015 12:05 pm

Phil, my frog room dropped by ~5-8 degrees when I completely switched from CFLs. I also saw a significant savings on my monthly electric bill (less power required, and less A/C).
They're a superior technology, but not quite perfected yet. We're close with Grow & Glow, though. I love those things!
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Re: LED lights getting hot and burning out??

Postby Philsuma » Wed May 06, 2015 11:55 am

Is it safe to say that the first generation jungle dawn lights have the 'increased' possibility of burn out? That the 'second generation' is much improved?

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Re: LED lights getting hot and burning out??

Postby joneill809 » Wed May 06, 2015 12:17 pm

Maybe...if you are not cooling them. I know the subsequent design added a vent on the plastic end cover but it did not seem like that significant of a change that would prevent burnout and eliminate the need for cooling. I still have all my first generation bulbs (6 I think) and they are chugging along. All my hoods are actively vented with a $15 fan and and $8 power supply (usually shared between two neighboring vivs). I think fans are a wise investment for any LED bulb.

Remove reflectors, add a fan of you are using Exo terra hoods - well worth it IMHO.
Jim from Austin please contact me if you are willing to trade offspring from:
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Re: LED lights getting hot and burning out??

Postby zonz540 » Wed May 06, 2015 12:25 pm

There is a temp decrease in the first and second generation Jungle Dawn bulbs. I haven't had any of the new ones go out, so I haven't molested any of the drivers to see if they differ.
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Re: LED lights getting hot and burning out??

Postby joneill809 » Wed May 06, 2015 1:10 pm

I think I have four 9w and two 11w first generation models. I wonder if the lower wattage bulbs didn't run as hot? Most of my second generations are 13's or megadawns and G&Gs.
Jim from Austin please contact me if you are willing to trade offspring from:
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http://www.oneillscrossing.com/dart-frogs/

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Re: LED lights getting hot and burning out??

Postby Philsuma » Wed Jan 20, 2016 10:09 am

I use clip fans for external air circulation across ALL my lights and fixtures year round. It's just a nice easy safe way to be.

I recommend store bought small fans mounted by clip or other means to your rack or nearby. No need to hard modify or otherwise get the fans 'into' the fixtures or housings. Go simply at first in the hobby, like with any other thing. Use a simple store bought fan.

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Re: LED lights getting hot and burning out??

Postby joneill809 » Wed Jan 20, 2016 1:09 pm

My updated stats are two failed jungle dawn bulbs out of 25 in use. Agree though - any airflow is helpful.
Jim from Austin please contact me if you are willing to trade offspring from:
lorenzo - schwinn line|NAIB true sips|fantastica nominant
http://www.oneillscrossing.com/dart-frogs/

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Re: LED lights getting hot and burning out??

Postby Philsuma » Wed Jan 20, 2016 1:58 pm

Poor Scott M. had like 8 burn and fail. He got his thru a 3rd party distributor - N.E Herp I believe and they went to bat for him and replaced them.

He had them ALL in hoods with reflectors and THAT is a big no-no.

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Re: LED lights getting hot and burning out??

Postby zonz540 » Wed Jan 20, 2016 2:27 pm

Phil, I've had mine in hoods since they came out. I've only lost three or four in that period of time (one actually was freestanding on top of a viv outside of a hood at the time), and I have 20-30 of them. If you take into account the temps and remove the reflectors in your hoods, as well as make sure your frog room isn't overly warm, there shouldn't be more casualties than you'd expect to see with some of the cheap Chinese components they use on the drivers over a period of 1-3 years anyway.
The bulbs are built well, for what they are. I wouldn't expect much more for their price point, and the fact that the extruded shell probably eats up a good amount of the wiggle room for margin. I would just go into it knowing that if you are investing in the Jungle Dawn models (not Glow N' Grow), you may suffer some losses over time.
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Re: LED lights getting hot and burning out??

Postby Philsuma » Wed Jan 20, 2016 2:35 pm

losing '3-4' in a year or even 2-3 years seems like too many in my book.

So you lost @ 12% of your lights in under a year?

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Re: LED lights getting hot and burning out??

Postby zonz540 » Wed Jan 20, 2016 2:49 pm

No, 3-4 over a period of 2-3 years. One in just over a year, then the rest.
It isn't ideal, but I can understand why it happens. The capacitors that have exploded in mine were low cost, Chinese brands. They were properly designed with 105 degree Celcius caps, and I know none of us are running that hot. I've used my IR thermometer many times to see what I'm running.
The quality control on those components is pretty terrible, so active or passive cooling you're probably going to see a few fizzle out over a year or more. That's the nature of buying Chinese electronics.
The diodes themselves are EXCELLENT quality. They've designed a wonderful bulb, but to hit a price point they've likely had to make sacrifices on the inside - and that is the issue. So, I picked up a bag of replacement drivers and I have them available when one happens to burn up. It's pretty simple to swap them.
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Re: LED lights getting hot and burning out??

Postby joneill809 » Wed Jan 20, 2016 3:03 pm

I have lost two of my 3 to 4 years old bulbs. So far my G&Gs have been solid. I have reduced my lighting to two bulbs per 18-18-24 from three which has reduced heat too.

Newer model bulbs have a plastic vented tip instead of a solid plastic cover. I am not sure how much that helps but I think it's a design nod to a heat problem.

I thought Todd had a one year warranty on the JDs but it is not mentioned on his site. He did mention it in this post here:
http://www.dartden.com/viewtopic.php?f= ... 07&p=53191
Jim from Austin please contact me if you are willing to trade offspring from:
lorenzo - schwinn line|NAIB true sips|fantastica nominant
http://www.oneillscrossing.com/dart-frogs/

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Re: LED lights getting hot and burning out??

Postby zonz540 » Wed Jan 20, 2016 3:14 pm

Yeah, I talked with Todd at length about it after the first one went. He is aware and had already made changes to include passive venting at the time. He did tell me that he covers them for a period of one year as well.

Bottom line:
I'd recommend keeping them as cool as possible, and to buy from a reputable dealer for warranty purposes, in the even you need it.
If you keep them in a hood, it may increase the likelihood of failure. So far, the second generation bulbs have been solid for me. I can't speak to what has been changed, other than the vents, as I haven't had to take one apart.
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Re: LED lights getting hot and burning out??

Postby Manzanitadude » Tue Feb 02, 2016 7:30 pm

Anytime you retrofit a LED into a hood without some type of active (best) or passive cooling you risk greatly shortening the life span of the LED bulb or fixture.


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