LED Replacement Bulb?

Ted

Ted

The pilot formerly known as Twin Engine Ted
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The wing ice light on the 310 is out... Again. This makes the third time it's gone out, and I've never been thrilled with its output. Its part number is:

MS25338-7079

Does anyone know of an LED replacement? Hoping to improve both light output and bulb life.
 
Heres the experimental version..1156 base will work
http://www.ledlight.com/1156-1157-automotive-led-lights.aspx
I went through them a lot (2 a year) in the FIKI Bonanza




just me but I think LED is a great be seen light but poor for broad illumination (of ice/runways)..but the LED will obviously hold up better and have less draw/heat..always a plus
 
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Thank you, Bruce and Clay. Excellent.

I figure in this case with the incandescent replacement bulbs costing $15 and doing a poor job, spending $25 on an LED replacement is at least worth a shot. Doubly so since I always end up finding out the stupid thing doesn't work when I need it. :)

And for the pretty poor current lighting that the current setup has, an LED I doubt will have a significantly worse impact, although I do agree that they aren't good for everything. I haven't put them in my car's taillights, for instance.

Next weekend when I head to the airport I'll pull the old bulb out so I can match the base up appropriately.
 
It would probably surprize you at how many cars roll off the assembly line with LEDs for taillight/Brakelight/turnsignals. Nowadays.
 
bluerooster said:
It would probably surprize you at how many cars roll off the assembly line with LEDs for taillight/Brakelight/turnsignals. Nowadays.
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and drunk drivers rejoice....
 
bluerooster said:
It would probably surprize you at how many cars roll off the assembly line with LEDs for taillight/Brakelight/turnsignals. Nowadays.
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It wouldn't surprise me one bit.

Those new cars also have lenses and reflectors that are designed for LEDs. The LED retrofit bulbs that would go in my car are much better than the ones that there were even a few years ago, but they don't take full advantage of the lenses.
 
The superbright folks have the ones that will work just fine.
They also let you in on a little tid-bit of little known info. A red LED of the same candella will be brighter than a white led behind a red lens.
Why? because the red lens will filter out all the light that's not red, so only the red light gets through.
 
Ok, part twow in the question.

This bulb, listed at Spruce as a 7079, has the offset prongs of an 1157 but the single bottom pole of an 1156. Doing a look at trying to match the bulb at O'Reilly turned up no results, and superbright doesn't have any 7079s.

Back to square one. What bulb would be a dropp-in?
 
Ted DuPuis said:
Ok, part twow in the question.

This bulb, listed at Spruce as a 7079, has the offset prongs of an 1157 but the single bottom pole of an 1156. Doing a look at trying to match the bulb at O'Reilly turned up no results, and superbright doesn't have any 7079s.

Back to square one. What bulb would be a dropp-in?
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Could consider installing a different base I suppose.
 
bnt83 said:
Could consider installing a different base I suppose.
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True, but I'd rather avoid that if at all possible. Might be worth a shot, though. The Aztec had a much, much better wing ice light.

On the other hand, I bought one LED panel light and tried that this weekend to see what I thought and make sure it worked with the dimmers. Wow, love it! We'll be buying a set for the panel.
 
Ted DuPuis said:
True, but I'd rather avoid that if at all possible. Might be worth a shot, though. The Aztec had a much, much better wing ice light.

On the other hand, I bought one LED panel light and tried that this weekend to see what I thought and make sure it worked with the dimmers. Wow, love it! We'll be buying a set for the panel.
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What is the part number for the dimmable LED panel light? Link?
 
SCCutler said:
What is the part number for the dimmable LED panel light? Link?
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Spike, here's the one that worked for the 310. You'll want to check to see if that fits in the Bonanza and probably want to do like I did and order one first. I don't know much about Bonanzas, but the dimmers in the 310 I believe actually adjust pulse width rather than simply add resistance.

http://www.aircraftspruce.com/catalog/elpages/marketled.php?clickkey=4708

It'll be on the list for probably later this year when I feel like getting to it. Doubt there will be much night flying between now and winter for us.
 
Ted DuPuis said:
True, but I'd rather avoid that if at all possible. Might be worth a shot, though. The Aztec had a much, much better wing ice light.

On the other hand, I bought one LED panel light and tried that this weekend to see what I thought and make sure it worked with the dimmers. Wow, love it! We'll be buying a set for the panel.
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As far as dimming, my experience was this: the superbrite single leds that we use in the panel are dimmable. The multi leds with some kind of driver mounted on the cca like the 1157s (it may have been a slightly different number) would not dim for me - darnit 1. I wanted it for my dimmable red overhead lamp in the Archer. Next, I tried to replace my overhead white lamp with a led but it interfered with the reflector - darnit 2. And darnit 3 was after using the panel leds at night a few times, when I would dim it to very low levels, I would see the intensity of all the panel leds oscillate with my strobes. They're driven by a stock npn power transister dimmer in the '80 Archer. All I could figure was the current pull was so low that it got into an operation range not designed for, and the output stage became sensitive to supply voltage fluctuations. I haven't heard anyone else describe this so I'm still shrugging on that one. Bottom line was, the light pulsing bugged me enough that I put the stock incandescent bulbs back in the panel and I've got a box of superbrite leds and a red and a white car taillight bulb in a box in the hangar. Pretty much an epic fail and I was bummed. I did at least get a Whelen led landing light succesfully installed though.

So, has anyone else been able to dim a multi led?
 
Good info, focal. I'm only looking at the panel lights at the moment for dimming, but that's a good point on seeing if they flicker with strobes at low intensities. That would annoy me.

I wasn't going to do the overhead lights as LEDs. Eventually want to do LED nav lights, but probably work with Whelen to find a wingtip strobe combo that will work for that.
 
Dean V said:
There may be a few lamp applications in airplanes that where LEDs may have some benefit, but where are you getting the approval to install them? My parts manual lists lamps by MS# and most of these are not listed as a preventative maint. item the owner can do? Nor are most of these lamps PMA'd
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Have a gander at FAR 21.303.b.2 and have a frank discussion with your A&P and your IA (preferably the same person). Most of us design to two specifications when we do retrofits:

MIL-TDD-41 and TLAR

(Make It Like The Damned Drawing For Once and That Looks About Right) :yes:


Jim
 
Ted DuPuis said:
Good info, focal. I'm only looking at the panel lights at the moment for dimming, but that's a good point on seeing if they flicker with strobes at low intensities. That would annoy me..
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The only reason that they would flicker with the strobes is if some clown decided to build in a switching power supply to the LED. Either pulse width modulators or plain old linear controllers that are properly designed will NOT fluctuate with power supply, strobe noise, or anything else.

Jim
 
weirdjim said:
The only reason that they would flicker with the strobes is if some clown decided to build in a switching power supply to the LED. Either pulse width modulators or plain old linear controllers that are properly designed will NOT fluctuate with power supply, strobe noise, or anything else.

Jim
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The panel leds were singles and don't appear to have any cca/power conditioning built into them. I'm fairly certain it was the circuit associated with my dimmer that was modulating the supply voltage to the leds that was the issue, not the leds themselves. I was doing some testing in the pattern. From full power to fairly low, no perceptable fluctuation. Lowering to minimums, the fluctuation was small but I did notice it, and it was in phase with the strobes. On a long dark flight, it would irritate me. Different/newer dimmers that are more robust might not have this problem. Anyway, it's a data point.
 
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Ted's comment about panel lights made me realize our post lights can probably be swapped... oooh... LEDs in those would be nice...
 
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