If you drive long distances at night, especially along poorly lit roads; an increase in light output is best upgrade you could do to increase safety. These Calibre Plus 90 globes produce 90% more light than a standard halogen globe, helping you pick up hazards further ahead on those late night drives. Despite being brighter these globes don't demand any more power or create any more head, making these bulbs great for vehicles with both glass and perspex headlight lenses.