Led Signal Tower Stack Lights, Industrial Warning Column Lamp, Andon With Rotatable Base, Steady/Flashing Switchable, 12V 24V DC (3-Layer, With Buzzer)

Works fine.

Bought this for a classroom project and it works pretty well. The lights are bright, but not bright enough to use outside in full sun and be reliable. Little switch on the PCB board to switch between flashing and solid, each color is independent. Both colors can be used at the same time. It's not really industrial grade, but it's also not at that price point. A similar light for a factory machine was over 500 dollars.

I’m using this in my garage with a 12vdc power brick I had laying around. Got to use my soldering skills after many years to connect it up. I have the brick plugged into a smart plug, controlled by Home Assistant. I use this to light up the lamp when the home security system is armed. So family members coming in thru the garage at night get a visual indication of the state of the security system. Light is bright and has options for steady or flashing. Very well made and fit my use case perfectly.

The base has to be attached to the lights. I found it easiest to remove the screw that holds the two halves of the base together in order to feed the wires through it. The lights can then be screwed onto the base. The light looks well made. It has a number of features that makes it easy to use. It uses 12V or 24V DC. Polarity does not matter, so it can be wired in NPN or PNP configurations. This means the common wire can either be positive or negative voltage. Each light has an internal switch so you can switch between flashing or solid light. The lenses can be removed individually by twisting off, but it is easiest to just twist off the green lens and then remove all lenses as a unit to get access to the internal switches.I tested the light with both 12VDC and 24VDC and the brightness appeared to be about the same. The audio alarm is not as loud as a smoke alarm but it is very noticeable. The only negative is the brightness which could higher. But it is fine for many indoor applications.

Works as well as ones costing five times as much.

It is difficult to see the lamps in daylight. They are ok in the dark.

These seem to work well. They're not crazy bright but are bright enough to see across the room. I don't think they'd work as well in an outdoor setting from far away, but you'd have to try them out to see.The brightness varies a bit with voltage. They technically light up around 6-7 V, but they're rated for 12-26. At 12V, they draw about 21 mA per light. Current draw increases, along with brightness, up to 16V, where they draw about 40 mA per light. After this, the brightness and current draw are constant up to at least 30V. In other words, at 30V, they still draw 40-42 mA per light, and do not change in brightness beyond 16V. I didn't check past 30V for power supply reasons. I assume the light will still draw 40-42 mA up to the rated 36V.

Since I did not get a clear answer from the seller, I opened the package and it was only then that I found a label on the light that actually states the black wire is to be connected to the neutral or common wire. Who in the H--- uses the word "naught"? All the other colored wires are connected with your power supply, usually black or red, wires. The light works great.