Long lasting energy saving bulb Less fuel consumption, lower CO2 emissions, energy saving, 30% more light. The reduction in the energy consumption of these bulbs results in optimising the fuel consumption of the car. The use of ECO Ballack saves up to 20% energy for each set of lamps. At the same time you contribute to the protection of the planet by reducing harmful CO2 emissions into the atmosphere. E13 – ECE R37 approved.