It sounds like you’re describing an infrared lamp manufactured by Narva, with specifications including a diameter of 125mm, power rating of 250W, utilizing an E27 socket, and operating at 220V. This type of infrared lamp is commonly used for various purposes such as providing heat therapy or warming specific areas. The “Narva infrarot 6000 biotherm” designation might refer to a specific model or series of lamps designed for therapeutic or biological applications.

Narva infrared 6000 Biotherm lamp 225V/250W - E27
The multi-purpose spotlight in tempered glass design for photography, medicine, animal rearing and agriculture.