Illumination device, lighting system and method of operating the illumination device

An illumination device comprising:

• a plurality of LEDs arranged on a carrier around a center thereof;
• an optical element disposed in a path of light emitted by at least one of said LEDs, an optical axis extending through said center and said optical element;
• and
• a driving unit for operating at least one of said LEDs,
• the driving unit in a first operation mode is configured to drive at a selected power P1 a first selection of LEDs L1 to issue a first beam with a first device light flux F1 and with a first beam width, and is configured to drive in an at least one further operation mode at a further selected power Pf a further selection of LEDs Lf, different in at least one LED from said first selection, to issue a further beam with a further device light flux, with 0.5*F1<=Ff<=1.5*F1, preferably with 0.8*F1<=Ff<=1.2*F1, and with a further beam width wider than the first beam width,
• wherein the LEDs Lf of the further selection of the LEDs are evenly distributed over the carrier in that shortest distances between each two neighboring LEDs of the LEDs Lf that are driven differ at the most by a factor three and wherein the first selection of LEDs has a first number N1 of LEDs and that the further selection of LEDs has a further number Nf of LEDs, wherein N1 is in the range of Nf±20%.