When the control cabinet of a robotic cell is powered up, the green diffused indicator lamp is installed on the status board to signal that the main drive has reached its ready state. As the PLC executes its start‑up routine, the lamp glows, giving the operator a clear visual cue that all safety loops are closed and the machine can accept motion commands. In a high‑speed packaging line, the same lamp is positioned at the entry of each conveyor segment; it flashes when a belt motor is energized, allowing maintenance staff to verify motor activation without opening the enclosure. Because the lamp’s light spreads uniformly, it remains visible even in dusty environments and under ambient illumination, which is essential for quick checks during shift changes. In plant engineering projects, the lamp is also used on remote monitoring panels to indicate the status of auxiliary equipment such as cooling fans. The result is a straightforward, colour‑coded method for confirming equipment readiness before production resumes.