private fun enable_light
	do
		light.asensor = sensormanager.get_default_sensor(new ASensorType.light)
		if light.asensor.address_is_null then
				print "Light sensor unavailable"
		else
			if eventqueue.enable_sensor(light.asensor) < 0 then print "Light enabling failed"
			eventqueue.set_event_rate(light.asensor, light.event_rate)
		end
	end