What is an H4 LED bulb?

An H4 LED bulb is a type of automotive headlight that uses LED technology and has an H4 base, which is a dual-filament bulb used in vehicles for both high beam and low beam functions. This makes the H4 LED bulb versatile, offering dual lighting in a single bulb.

Are H4 LED bulbs brighter than halogen bulbs?

Yes! H4 LED bulbs generally provide significantly more brightness compared to traditional halogen bulbs. An H4 LED can have up to 3,600-10,800 lumens or more, while a halogen bulb typically ranges from 1,000 to 1,500 lumens. This increased brightness improves visibility and safety while driving at night.

What color temperature should I choose for my H4 LED bulbs?

The color temperature of a H4 LED bulb is usually measured in Kelvin (K) and affects the color of the light. Common options include:

• 3,000K: Yellow or amber light, good for foggy or rainy conditions as it reduces glare.
• 4,300K: White light that closely resembles daylight, offering excellent visibility without causing eye strain.
• 6,500K: A cooler, blue-white light, commonly preferred for aesthetic purposes or a modern look, but may cause more glare for other drivers.

What are the benefits of H4 LED bulbs?

• Longer lifespan: LED bulbs can last up to 30,000-50,000 hours, far outlasting halogen bulbs which typically last 1,000-2,000 hours.
• Improved visibility: H4 LED bulbs offer brighter and clearer illumination, enhancing road safety and reducing eye strain during night driving.
• Energy efficiency: LEDs consume much less power than halogen bulbs, which helps conserve battery life and reduce load on the car’s electrical system.
• Durability: LEDs are generally more resistant to shock and vibration, making them a more robust option for long-term use.

Do H4 LED bulbs generate heat?

Yes, LED bulbs do generate heat, but they are designed with heat sinks or fans to dissipate the heat efficiently. It's important to ensure that the bulbs you choose have good thermal management to prevent overheating and potential damage to the bulb or the headlight assembly.

Can I use H4 LED bulbs in a projector lens headlight?

Yes, many H4 LED bulbs are designed to work with projector lens headlights, but it’s important to check the specifications to ensure the bulb’s beam pattern matches what your projector lens is designed for. Improperly aligned bulbs can result in uneven lighting, creating glare or reducing road visibility.

Will I need an adapter or resistor when installing H4 LED bulbs?

It’s possible that you’ll need an adapter or resistor, especially if your car uses a canbus system. Some modern vehicles have onboard diagnostics that might detect a change in bulb type and trigger an error message. Using an adapter or resistor can help prevent flickering or error codes by balancing the load on the car's electrical system.

How long do H4 LED bulbs last?

On average, H4 LED bulbs last anywhere from 30,000 to 50,000 hours, which is much longer than halogen bulbs. This translates to many years of use, depending on driving habits.