Updated: Apr 6
When it comes to choosing the right headlight bulb for your vehicle there are a lot of options to consider. Two popular choices are the H4 and H7 globes. Both globes have their advantages and disadvantages so it's important to understand the differences before making a decision.
The H4 globe is a dual-beam bulb which means it has two filaments in the same bulb. One filament is for low beam and the other is for high beam. This makes the H4 globe a convenient option for drivers who want both low and high beam headlights in one bulb.
The H7 bulb is designed with a single-beam globe that consists of only one filament. It is used only for low beam headlights so if you want high beam headlights you need to purchase a separate bulb. The H7 globe is often found in European vehicles and is known for its bright and white light.
Which one is brighter?
In terms of brightness the H7 globe is generally brighter than the H4 globe. This is because the H7 globe has a single filament which allows for more light output per filament. But this feature also makes the H7 bulb not ideal for cars that need both low and high beam headlights.
Another difference between the H4 and H7 globes is their installation. The H4 globe is designed to be a plug-and-play bulb which means it can be easily installed without any modifications to the vehicle's wiring. But the H7 globe requires a separate adapter in order to be installed in most vehicles.
When it comes to cost the H7 globe is typically more expensive than the H4 globe. This is because the H7 globe is less common and requires a separate adapter for installation.
Will an H4 bulb fit an H7 socket?
The simple answer is no, you can't use them interchangeably because they have different designs. The H4 bulb has two filaments one for high beam and one for low beam and it has three pins on its base. But the H7 bulb has only one filament for low beam and relies on a separate bulb for high beam and it has only two pins on its base.