4pcs 12V 10W 1000LM LED Panel Strip Light COB Chip Light Lamp Car Light Source DIY Spotlight Floor Lighting 120X36mm Warm White

They need to eliminate “adhesion” from the ratings category as it does not apply.Anyhow these are awesome but a little dangerous. They are bright, really bright, and without the addition of some form of heat sinking they can only be run for very short durations. That said with a few aluminum fins on the back I run mine constantly sometimes for days without any problems but I would avoid leaving these unattended anywhere that’s very flammable. Soldering them is not that big of an issue if you aren’t a novice and do your prep work. What is an issue is that any voltage source exceeding 12v by even a very small amount will cause the light to heat up very quickly to scalding temperatures. I used one to make a big headlamp and all was well I basically had the sun on my hat until I substituted one of my 16v battery packs absentmindedly for the 12v I had been using. Within about a minute smoke started pouring off the brim of my hat and it blistered my fingers in the 2 seconds it took to snatch it off my head. Lesson learned… the light still works btw… I’d buy these again if not for the shipping fee that’s been added.

Without a heat-sink my solder melted and the wire came off. The melting temperature is (according to my the min it takes my digital soldering iron to melt it) 450⁰F. That's crazy hot.I added a 5.9" x 2.9 x 0.4 thick heating element, which has 5.4x the mass of the light bar. I used a thin layer of an appropriate thermal adhesive to join them together and allowed several days for it to cure. This thing still ran so hot that I couldn't grab the heat sink. I believe this assembly was dangerously hot, and could potentially present a safety issue.To be clear, this unit is connected to the 12Vdc of my travel trailer, which I don't believe is regulated 12V. It may be running higher than 12V. So, it's possible that this is the source of the incredibly high heat.I'll change my review if I'm confronted with new facts.

So at the moment i have one of the lights acting as an extra reverse/rear light, works great and all and very bright, but.. Turns out some of the other reviewers were correct.. I had some small magnets with adhesive on the lights so i could have the light on my barn doors, but a few moments ago not only did the light get so hot that the adhesive stopped sticking to the light one of the wires got desoldered from the pad.The light would have to get HELLA hot to do that...So to future purchasers, be sure to get a heatsink for these lights if they are to be used for longer than a few minutes.1 more thing.. The lights may or may not use more than 10w each depending on the power source, so keep that in mind.5/18/2023So i decided to have a power usage test using 16(or 18, prolly 16) gauge wire from an outdoor extension cord i scavenged the wire from and a 60W 12V Power supply powered from a Craftsman 20V battery and their 150W Inverter. Well suffice to say i was surprised.. It went BEYOND the 10W stated on the description and maxed out the the power supply at around 65W but was using less than an 1 Amp, around 700mA, thats including the conversion of the inverter and the power supply itself. And let me tell you did it get HOT!On the other hand, i have 2 of these lights in parallel using them as yard lights attached to a pole using the same power supply using the same wire and they dont remotely use that much power or get that hot even though they are powered together (which may be the limiting factor).So in shortLIMIT the gauge wire you use to something like 20 MAYBE 22 Gauge Max so the lights cant suck up as much wattage as they want, and use a heatsink if possible. When in doubt, test them before you put them to use.

Bright as heck, nice diffuse for area lighting, need some skillz to drill holes and know how to heat sink properly. i'm putting a clear plastic cover on mine because it's got factory silicone on it now which can be scraped off and be destroyed.very good COB LED matrix IMO.

Outdoor landscape lightings are okay but very difficult to soldering the wire

SuperBright… Hands-down the brightest LEDs I have ever seen… And that is no exaggeration… I’m actually about to order some more as we speak

First, when I soldered wires on to it I over heated the whole board due to the aluminum plate it is on causing some leds to burn out. surface mount low temp solder then. Next I connected directly to 12v even though there is no current limiting resistor on the board which is required for leds not to over heat. The solder melted and the wires fell off, it got over 250°F. After I put a 1.6 ohm 3w resistor in series the heat levels dropped to a little over 100°F, warm to the touch. be ware of using this as directed without a heat sink and fan, even that might not be enough, a resistor in series is my recommendation.

Good product, does need a heat sink if your going to run full blast for any length of time. Bright for power consumption.