Do you think I can use 2 of 6V LED in the row with 12V.

I gave up on the idea of making the panel a permanent fixture in my RV and converted the light to 12V, with cord in on it.
This way I can use it for camp set-up, or in emergencies.
Also converted only 4 out of 5 panels, to avoid higher heat.

Back from my long vacations, although driving 8000 miles is not giving that much rest.
So now I am working on 2nd panel after 1st burned some LEDs when I rewire it to have rows of 4 LED. It did work for some time (and still does) but looks like 14.5V the converter gives me and lack of heat exchange at converted fixture made the whole thing too hot.
So I am trying to connect 6 LEDs in the row (multiplying them on the panel) and the thing will not light up. I rechecked it several times both ways and when I connect row of 4 to 12.5V battery, they will work, but row of 6 will not.
The DC/DV converter wa8yxnm mention not only cost money, but they would not fit in the fixture.
So any other suggestions?

Ok I will say again if you put the two panels in series they need to be absolutely identical. Even one burned out led will toast both panels.

BUT. YOu can get a DC/DC converter This works rather well around 90% or efficient.. and converts 12 volts to anywhere between a volt or 2 and around 10. (Some are adjustable) Allelectronics.com has some usually on sale (right now it's a UP-Verter that's on sale not a down)

YOu see magic happen when you use one of these. By Magic I mean if the LED's are powerful enough they might draw say 2 amps.. And the DC/DC converter will be putting out 2 amps. but the INPUT will only be one.

It not only converted 12 volts to six. but ``1 amp to 2 (Watts remain the same though `12/12)

Well.... first night with hook up and the 14.5V my converter supply did overheat the lights.
The silver plastic melted on one side and about 55% of LED burned out.
The rest still work, but the light output seem low.
So when I liked the light output, the reliability sucks. I think for winter season I will convert 2nd light panel I have into 3-row system, what should give it good reliability.
Will see how much dimmer LED will be.
Watch and learn.

I already installed the new panel in camper and comparing it to other fixtures it is like



The panel takes o.66 amp and having it with front holder I hope to avoid overheating issues I had with self-sticking panels.

Rewiring works.
Having mechanical skills, I can't test electronic board, but I can figure out parallel vs row routing.
So I cut the circuit board to separate LED on 2 separate halves.
Here is first test, what light up 48 LED and confirm I am on right track.

Click For Full-Size Image.
Than I found new use for the lights. In my camper main light, I put LED panels into old fluorescent fixtures. Even with 8 of small panels - DW complain about darkness.
So having "there is not such thing like too much light" in mind- I went extra way to connect the 12 LED that were cut off in the center.
Here is how the final wiring and front effect come up.
I wire it with no voltage regulator, so I'll see if 14V I might have in the camper will create an issue.


Click For Full-Size Image.

Click For Full-Size Image.

Thanks CA Traveler for the idea and for all contributions.

Suggest you include a poor mans current regulator (6 or12v filament light bulb) in series with the led’s. The higher the bulb wattage the brighter the led’s. If you don’t get enough light put the led’s in parallel or a separate bulb for each light.

It helps to have a collection of old bulbs.

You say the second one hasn't failed yet. Open it up and measure the voltage going to the wires you're showing.

Do you understand the difference between parallel and series circuits?

If you wire them in parallel, they both get the same voltage.
If you wire them in series, each one gets 1/2 of the voltage.

about $15 for mid-grade that last 2 years.

How much are new batteries?