5Pcs 12mm LED Metal Indicator Light AC 110V-220V Waterproof Signal Lamp (Red)

I purchased the 5 pcs 12mm Lights and they work exactly as expected. The build quality is solid, the lights are bright, and the price is very reasonable. I only needed the red and green indicators for my project, and both performed perfectly. Waterproof housing and metal body make them feel durable. Overall, a great value for anyone needing reliable indicator lights.

Very cool. The way the product works so that you get only one of three colors is very cool. Connect one lead to battery, and power the light by connecting any one of the three color leads to ground. To make use of the multiple colors in a circuit, consider how to design the circuit so that the desired color is grounded while the others are floating. In the event your circuit grounds multiple leads, the selected color is prioritized in order of red first, yellow next, and green. Example, if green and red are grounded, the color will be red. Why really cool? The colors follow a prioritization scheme. For example when used with a Victron low battery disconnect product, I connected the battery wire of the LED to the input to the Victron input (which runs to the refigerator circuit breaker on a dc panel), the yellow wire to the refrigerator with a pull down resistor connected to ground; and wire the left side of a DPDT on-off-on bypass switch wired with the center terminal to ground and with the other two terminals connected to red and green, and the right side of the switch connecting the refrigerator (center terminal) to either the Victron output or the 12v from the refrigerator circuit breaker (which would bypass the Victron disconnect). When the fridge circuit breaker is off, there is no light, otherwise, when the fridge has no power the yellow light is on, when the fridge has power normally (the victron did not cutoff for low battery voltage) the lights is green, when the fridge has power but in the bypass switch position the light is red, e.g. red = warning the victron is bypassed.

These are nice bright LEDs. I bought them as indicator bulbs for the zoned hydronic heating system in my house and they work perfectly.

Bought these for a hobby electrical project (building a firing box for model rocketry). They were affordable, came in five different colors, seem to work fine, are adequately bright, and are easy to mount. However, I was disappointed at the lack of documentation regarding their electrical properties. Because I'm using these in an analog circuit being used to ignite pyrotechnics, with safety implications, it's absolutely critical that I know things like the resistance and forward voltage of these LEDs, so I can ensure that continuity test currents are sufficiently low to be safe and firing currents are sufficiently high to be reliable. I had hoped for some kind of spec sheet that would come with the product, or at least a label that would cite electrical properties. But... nothing. Not even a specification of whether they contain internal resistors or not (most indicator LEDs these days do have internal resistors, but not all, and it's vitally important to know if one is using them in a firing circuit). I ended up wiring them up in a simple test circuit and using a multimeter to estimate their properties. Turns out they must have internal resistors... when disconnected, they show infinite resistance (as LED's should), and when on, I was able to estimate a resistance of ~2.2 kOhm. (Side note: they light up just fine on 9V, which corresponded to about 4 mA of current). Still, it would have been nice to have that written down somewhere! Also, they don't seem to behave like LED's... I couldn't seem to measure a significant forward voltage, and they illuminate equally well regardless of polarity, whereas LEDs should only light with current flowing in one direction and not the other. I'm probably inexperienced with how LED indicator lights are made, but either they have an extremely low breakdown voltage (as well as a low forward voltage), or they have more complex internal wiring to allow them to light either way with minimal voltage drop. If you're not doing analog circuit design and just dropping them into an existing 12 V boat or car system or something where you don't care exactly how much current ends up where, they're just fine and probably great for the average customer. If you're trying to use them in a carefully designed analog circuit, especially one with safety implications, you probably want to look for a product with better documentation of what it is you're wiring in!

I wired these in with my heat cable as an indicator light. They are wired into 110 and work exceptionally well.

Nice and bright. Fit well

These colored lights worked great to show my parts washer was on that I have restored. I think there is many uses for the rest like my crock pot has a broken light on it

Perfect size for what I need

Die Signalleuchten haben ein schönes Licht, sind leicht zu montieren und anzuschließen, sehen gut aus.

Mooie kleine ledlampjes

These LED lights are of excellent quality. I contacted the seller and had a question about these lights. He promptly responded and now I know that they are dimmable.

ottimo prodotto

Parfait !!!