Lamp for heating having a reflective film for transmitting different radiation portions

摘要

A lamp includes a lamp vessel, an incandescent body arranged in the lamp vessel, and current supply conductors connected to the incandescent body. The incandescent body is configured to emit a radiation spectrum including a visible portion and an infrared portion. An outer envelope around the lamp vessel has a reflective film adapted to transmit a first part of the visible portion and a second part of the infrared portion, the second part being greater than the first part.