Description

Introduction

Commercial and heavy-duty vehicles running on 24-volt electrical systems need headlight bulbs built specifically for that voltage — a standard 12V car bulb simply won’t work. The Grant H4 Halogen Bulb (24V/100-90W) is designed exactly for this purpose, offering a brighter alternative to standard-output bulbs through its “+30% More Light” formulation. This guide covers what you need to know about the Grant H4 halogen bulb before you buy — from its features and specifications to installation and care.

Features

The Grant H4 Halogen Bulb uses a dual-filament halogen design, allowing a single bulb to handle both high-beam (100W) and low-beam (90W) functions — a common and efficient configuration for trucks and buses. Housed in a heat-resistant glass envelope, the bulb is built to handle the higher electrical load of 24V commercial vehicle systems. It uses the industry-standard P43T base for the H4 bulb type, making it compatible with a wide range of 24V-equipped trucks, buses, and other heavy vehicles operating across Pakistan’s road network.

Benefits

For drivers of 24V commercial vehicles, having a bright, reliable headlight bulb is essential — long highway routes, poorly lit rural roads, and night-time deliveries all demand strong visibility. The Grant H4 bulb’s “+30% More Light” design is intended to improve on standard bulb brightness, helping drivers see further ahead and react sooner to obstacles, pedestrians, or other vehicles. Because it’s a direct-fit halogen replacement, there’s no need for additional wiring, converters, or control modules — simply swap the old bulb for the new one and you’re back on the road.

Specifications Table

See the full technical specification table in Section 6 below.

Compatibility

The Grant H4 bulb is designed for vehicles with a 24V electrical system and a standard H4 (P43T base) headlight socket — commonly found in trucks, buses, and other heavy commercial vehicles. This bulb is not suitable for standard 12V passenger cars. Always confirm your vehicle’s voltage and existing bulb type (check your owner’s manual or the markings on your current bulb) before purchasing to ensure correct compatibility.

Installation Guide

1. Turn off the engine and headlights, and allow the existing bulb to cool completely before starting.
2. Open the headlight housing access point (often from behind, inside the engine bay).
3. Disconnect the electrical connector from the back of the old H4 bulb.
4. Release the retaining clip or twist-lock securing the bulb, then remove the old bulb carefully.
5. Insert the new Grant H4 bulb into the socket, handling it by the base only — avoid touching the glass with bare fingers, as skin oils can shorten bulb life.
6. Secure the retaining clip and reconnect the electrical connector firmly.
7. Test the headlight (high and low beam) before closing up the housing to confirm correct installation.

Given the size and electrical demands of most 24V commercial vehicles, it’s recommended to have this replacement performed or checked by a qualified truck/fleet mechanic if you’re unfamiliar with the process.

Package Includes

See Section 7 below for the full package contents list.

Care Instructions

Never touch the glass envelope of the bulb with bare hands — oils from skin can cause hot spots that lead to premature bulb failure. Keep the bulb’s connector and housing free from dirt, moisture, and corrosion, and ensure all seals are properly refitted after installation to keep water out of the headlight assembly. Store any spare bulbs in their original packaging, in a cool, dry place away from direct sunlight.

Warranty

Warranty terms could not be officially verified for this product at the time of writing. Please confirm applicable warranty or replacement policy with your seller or retailer at the time of purchase.

Why Buy This Product

The Grant H4 Halogen Bulb offers commercial and heavy-vehicle drivers in Pakistan a straightforward, budget-conscious way to maintain strong headlight performance on their 24V trucks and buses. With its dual-filament design and “+30% More Light” output, it’s a practical choice for fleet operators and drivers who depend on reliable night-time visibility.

4. Product Highlights

• Grant H4 halogen bulb built for 24V commercial vehicle systems
• Dual-filament design: 100W high beam / 90W low beam
• “+30% More Light” formulation for improved visibility
• Standard P43T base for wide 24V truck/bus compatibility
• Heat-resistant glass construction for demanding conditions
• Simple plug-and-play installation, no rewiring required
• Ideal for trucks, buses, and other heavy-duty vehicles
• Strong, consistent beam for long highway driving at night
• Affordable replacement bulb for fleet and commercial use
• Trusted choice for 24V vehicle owners across Pakistan

5. Key Features

• Grant H4 halogen headlight bulb – 24V/100-90W power rating
• Dual-filament design for combined high-beam and low-beam use
• “+30% More Light” output for enhanced night-time visibility
• Standard P43T base for accurate, secure socket fitment
• Built for 24V commercial vehicles, trucks, and buses
• Heat-resistant construction for reliable, long-term use
• Easy DIY installation with no special tools required
• Consistent illumination for safer long-distance highway driving
• Cost-effective halogen bulb for Pakistani fleet operators
• Reliable lighting performance for commercial night driving

6. Technical Specifications

7. Package Includes

• 1 x Grant H4 Halogen Bulb (24V/100-90W)
• Original Grant retail packaging box