of leds are arranged in the bulb in the figure the lamp bulb is made of polycarbonate but alternatively can be made of glass or any other light transmittable solid material for example pmma cooling means 6 for cooling the lamp during operation are provided the cooling means comprising at least two facing cooling fins 7 8 which are separated by a spacing 9 the spacing being 8 mm said spacing is in open communication with the external environment of the lamp the light source is mounted on a pcb which simultaneously acts as the cooling fin a lamp axis 10 extends along the insertion direction through a central end 11 of the socket through said spacing and through a virtual central extreme 12 of the bulb that is most remote from the socket the lamp comprises a light redistributing light transmittable wall 13 comprising two halves 14 15 for redistributing light originating from the light source i e a led in each of two bulb halves 18 19 of the lamp bulb 4 so as to obtain a desired light distribution during operation of the lamp fig1 b shows a graph of the relative luminous intensity in annular direction around the.