12v led floodlight wiring problems

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edge800
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12v led floodlight wiring problems

I purchased #6 48w primepro led worklights with the intention of wiring them together in parallel to light up a storage locker I use in michigan.
The part # is 50e48w-f 48w 3.8watts @12v 3120 lumins. When #5 were wired together #2 worked but the other #3 just blinked. They all work by themselves not together. I am using a 12v car battery to power them. Any help would be welcome John

Speed4goal
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Can you take some pictures of the wiring you did. Might help out more if people can see what you’ve done/changed

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Angler
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What wire did you use?
Without more information, best guess is too much voltage drop across the wires.
Probably the length of wires are too long, and/or wires are too thin.

Try running a separate wire to each light instead of daisy-chaining them.

This is a common problem when connecting multiple lights in parallel.

edge800
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Can’t seem to get a picture uploaded. I used #14 wire on a 50 ft spool , sounds like part of the problem. When I get home I’ll shorten the wire and see if that helps. I’ll post what happens

dchomak
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I checked online, EACH of those lights draw 3.8A at 12V. Times that by 5 lights and that is almost 20A.
Also online I found that 14 gauge wire is around 0.25 ohms per 100 feet. If your run is 50 feet, then you are using 100 feet of wire up and back. From Ohms law, E = IxR , so you are dropping 20A x 0.25 Volts, or about 5V.
That’s your problem.

An easy solution would be to use your existing wire and run it on 24V, 2 car batteries in series.
Also from online I see that those lights can run on 12-30V DC

Lightbringer
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And keep in mind that most car batteries are maybe 70AH-80AH, so running them at a full 20A will be 3H at best from fully-charged to completely dead. More like 1hr, if that, before they start blinking again.

And Pb-acid batteries do NOT like being drained low. Even once will ruin them.

Even deep-cycle marine batteries will suffer drastically reduced cycle life the deeper they’re drained.

You’d better have some plan to keep that battery topped off between visits, else it won’t last very long at all. Even an unregulated wall-wart (which’ll float high to 15V or more when unloaded) can help.

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edge800
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Thanks for all the great info. I only need maybe 10ft of wire for use. If I only get a couple hrs of time that’s OK.I work on my snowmobiles and boat there.

edge800
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I shortened the cable and eliminated one light and everything works good now. Thanks for all the good information John