When you need to communicate machine status at a glance, the choice usually comes down to a compact panel indicator or a freestanding signal tower. In the world of signaling indicators and operator controls, both approaches get the job done, but they solve different installation and visibility problems. One is a compact status light, the other is a multi-color tower with audible warning. Which one you choose depends on where the operator works and how many signals you actually need.
Quick Verdict
If you are building or replacing an indicator in a control panel, the Schneider Electric 9001KP35LGG31 is the straightforward pick. It is a pilot light designed for conventional operator stations. If you need a signal that operators can spot across a workshop and want multi-color status plus an audible warning, the Industrial Signal Tower Light gives you a self-contained machine-status station.
Comparison
| Decision | Schneider Electric 9001KP35LGG31 | Industrial Signal Tower Light |
|---|---|---|
| Listed price | USD 45.99 | USD 31.56 |
| Condition | Used | New |
| Power | 120V AC | 110VAC, 2W |
| Signals | Green illuminated lens | Red, yellow and green LEDs + buzzer |
| Mounting | Panel mount, 30mm | Table mount with bracket |
| Best fit | Control panels and operator stations | Machine tools, conveyors and shop-floor visibility |
Where Each Product Wins
The Schneider Electric pilot light wins when your operator station already has a matching cutout and you need a conventional status lamp. Its heavy-duty design and screw terminal connections are built around panels and enclosures, not open-air mounting. It is also the only one of the two that matches the familiar pilot-device family, so it can sit alongside existing pushbuttons and selector switches.
The Industrial Signal Tower Light wins when visibility and alert complexity matter more than panel integration. It covers multiple signal states in one device and the 360° round tower design means the light is visible from more angles than a single lens. The remote control method lets you switch signals without walking up to the tower. At a lower listed price, it covers broader signaling needs.
Product Notes
Schneider Electric 9001KP35LGG31 30mm 120V~ Green Standard Pilot Light Used

The Schneider Electric 9001KP35LGG31 gives you a green illuminated indicator from the 9001K series, designed for heavy-duty industrial panels. It mounts into a 30mm panel opening, runs on 120V AC, and uses screw terminals, which makes it a good fit for operator stations that already have pilot devices on the door. Each unit has been individually powered at 120V AC and confirmed to illuminate, so the basic function should be settled before you install it. The tradeoff is condition: this is a used industrial component, and cosmetic condition varies between units, so minor marks or discoloration from previous mounting are normal. You are buying one pilot light per quantity, and the green lens means it can only show one signal state. If you want a single, familiar panel indicator and are comfortable with used-condition cosmetics, this is the one.
Industrial Signal Tower Light - 110VAC 3-Color LED Stack Flashing Warning Light

The Industrial Signal Tower Light covers more machine-status roles in one device. It runs on 110VAC with 2W of power, and it stacks red, yellow and green LEDs with a built-in buzzer, so you can combine light color and sound for different operating states. The round tower shape gives 360° illumination, which is useful for machines, conveyors, or systems where an operator may not be standing directly in front of the panel. It arrives new with a mounting bracket and is designed for machine tools, special machines, and robots. Its limitation is that it is not a panel-mount indicator, so it will not fill a 30mm pilot hole or match an existing control-station layout. For a self-contained visual and audible warning station, it is the more flexible purchase.
Final Choice by Use Case
Choose the Schneider Electric 9001KP35LGG31 when you are working on a conventional operator control panel and need a drop-in status light. Choose the Industrial Signal Tower Light when you need a multi-color, flashing, audible signal that can be mounted on a machine and seen from multiple directions. For panel integration, go with the Schneider Electric pilot light; for machine-wide signaling, the Industrial Signal Tower Light has more to offer.