is indicated with arrows i in fig2 fig2 is a longitudinal cross sectional view indicated in fig1 with arrows ii only a part of the luminaire is represented including one of the two ends of the luminaire the elongated luminaire is provided with a number of side emitting leds 1 mounted in a straight array on a strip like elongated base plate 2 the distance between the leds may be about 15 cm or more but the mutual distance may also be much smaller for example 1 cm or less two elongated reflectors 3 are fixed to the base plate 2 for example by means of glue the reflecting surfaces 4 of the two reflectors 3 are undulated in the longitudinal direction of the luminaire therefore the light radiation is reflected in many directions by each portion of the reflecting surface 4 each reflector 3 has an edge 7 facing away from the base plate 2 the edges 7 both define and border a light emission window 8 the leds 1 optionally may extend through the light emission window fig3 the luminaire is designed to illuminate objects in front of the luminaire i e illuminate objects that are positioned on a side 9 of the light emission window 8 facing away from the base.