According to local authorities this is supposed to be a sustainably safe roundabout, among others because the bicycle and pedestrian crossings have been elevated and the lanes are separated by islands, so pedestrians need only cross a single lane at a time.
But apparently these measures were insufficient to ensure the safety of cyclists, so additional striking led lighting was installed in the road surface.
The manufacturer provided software made specifically for this location, which would ensure reliable detection of cyclists.
The use of led lights to warn drivers of cyclists is not entirely novel. At the Nansenplein roundabout in Goes led lights have been incorporated into the road surface that start flashing when cyclists are approaching. At the same time the warning signs on either side of the crossing will light up as well. The use of flashing leds is controversial, however. According to opponents to this approach drivers might start counting on being warned of cyclists by means of leds, even where this is not the case.