Halogen Bulbs are built to match and surpass specifications of OEM globes. Each globe is UV cut and manufactured from both quartz and hard glass making them perfectly suitable for use with glass and polycarbonate lenses. This particular H4 globe contains two filaments, one for high beam and one for low beam, suitable for a wide range of 12V cars, 4WD's and trucks with combined headlights. The light emitted by this bulb is a traditional 'yellow-ish' colour of approximately 3200K, common to most halogen bulbs. If you're looking for a simple replacement for factory globes, this is a perfect choice.