Bosch Optic Edge Halogen capsule bulbs are brighter than our Optic Plus bulbs. Optic Edge has best in class illumination and night vision for added safety. All Bosch Bulbs are a direct original equipment replacement for easy installation. Bosch Bulbs use a proprietary mixture of tungsten and gases, which are two key components of a light bulb for energy efficiency and longer life. Bosch Bulbs are 100% tested, ensuring they meet SAE standards.