A tubular skylight, comprising a tubular body (2) provided with an inner reflecting surface (3), a light collector (4) mounted to a first end of the tubular body (2) and a light diffuser (6) mounted to a second end of said tubular body (2). The skylight further comprises a source of artificial light (9) external to the tubular body (2) to enable it not to interfere with the natural light, and mounted in the vicinity of the diffuser (6). This artificial-light source (9) is preferably defined by a plurality of LEDs positioned around the diffuser (6) itself.