H4 Car Headlight Bulbs
Ensure clearer and safer driving with high-quality H4 car headlight bulbs from Halfords. Designed with dual filaments, H4 bulbs provide both high and low beams, delivering consistent brightness for enhanced visibility in all conditions. Looking for reliable and long-lasting H4 bulbs? Explore our range at Halfords and find the perfect fit for your vehicle.
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What's the difference between h4 and h7 bulbs?
H4 and H7 bulbs are not interchangeable as they have different designs and functions:
H4 bulbs have dual filaments, providing both high and low beams in a single bulb.
H7 bulbs have a single filament, meaning separate bulbs are needed for high and low beams.
Visit your nearest Halfords store for expert advice and fitting services!
How many amps does a h4 bulb draw?
An H4 headlight bulb is a dual-filament bulb, meaning it operates at two different wattages—typically 60W for high beam and 55W for low beam. At a standard 12V power supply, the current draw is:
High beam (60W): ~5 amps
Low beam (55W): ~4.6 amps
Higher wattage H4 bulbs, such as 100/90W variants, will draw more power and may require upgraded wiring to prevent overheating or voltage drops.
What car does a h4 bulb fit?
H4 bulbs are commonly used in cars, motorcycles, and some trucks that require a dual-filament headlight bulb, meaning they provide both high and low beams in a single unit. They are widely found in older vehicles, classic cars, and certain modern models that still use this design.
To check if an H4 bulb fits your vehicle, use the Halfords Car Bulb Buyer's Guide or visit your nearest Halfords store, where our experts can help you find the right fit and even install it for you.
What is the difference between h1 and h4 bulbs?
H1 and H4 bulbs serve different purposes and are not interchangeable. Here’s how they differ:
H1 Bulbs: Single-filament bulbs used for either high beams, low beams, or fog lights, depending on the vehicle's setup.
H4 Bulbs: Dual-filament bulbs that provide both high and low beams in one bulb, commonly used in older and some modern vehicles.