The new LED emits a deep-red light at a wavelength of 660 nanometers.
This is perfect for plant photosynthesis, the manufacturer explained.
The device boasts an efficiency of 37 per cent - one of the highest for a light source of this colour.
In addition to this, the LED yields considerable energy savings compared to conventional lamps.
During a pilot project in Denmark, which used around 50,000 LEDs to illuminate a cultivation area of several thousand square metres, it was found that power consumption in the greenhouse fell by an impressive 40 per cent.
Siemens, which was founded in 1847, is the largest engineering conglomerate in Europe.
In total, Siemens and its subsidiary firms employ approximately 420,800 people in nearly 190 countries.
The firm's international headquarters are located in Berlin, Munich and Erlangen, Germany.
