Product Specifications

ITEM	VOLTAGE	WATTAGE	BASE	CERT
H11B	12V	55W	PGJY19-2

I. Origin & Specific Purpose
The H11B is a variant of the H11, developed by manufacturers to meet specific beam pattern regulations and headlamp design requirements. Its creation stems from the need for more precise light control, particularly in markets like North America. The letter “B” does not denote wattage but stands for “Block” or “Beam Shield”. Compared to the standard H11, the H11B incorporates a tiny metal shield either inside the glass bulb or on its base. Its sole function is to precisely block a portion of the light to create the regulated low-beam cut-off pattern and prevent glare for oncoming traffic. It is an engineered product designed exclusively for low-beam applications.

II. Core Advantages

1. Regulatory Compliance Assurance: The integrated shield ensures the light output strictly complies with low-beam safety regulations in specific regions (e.g., North American DOT standards), making it the most reliable choice for OEM-compliant lighting.

2. Precise Anti-Glare Performance: By physically blocking stray light at the source, it eliminates that causes glare, safeguarding oncoming drivers—a testament to active safety design.

3. Perfect OEM Replacement: Optimized for the optical design of headlamp units that specify H11B, it delivers 100% restoration of original light performance, including the sharpness and angle of the cut-off line. It is the definitive replacement for worn bulbs.

III. Product Features & Critical Distinction

• Defining Feature: Integrated Beam Shield: This is the fundamental difference between H11B and standard H11. The shield is precision-positioned, non-removable, and designed specifically to shape the low beam pattern.

• Identical Base & Electrical Specs: The H11B shares the exact same PGJ19-2 bayonet base and electrical interface (typically 55W) as the standard H11. This means they can physically plug into the same socket.

• Critical Warning: NOT Interchangeable: Despite the shared interface, it is absolutely prohibited to replace a factory-designed H11B with a standard H11, or vice versa. The absence or addition of the shield will result in an incorrect beam pattern—either causing illegal, dangerous glare or creating dark spots in illumination, posing a serious safety hazard.

• Vehicle-Specific Nature: The H11B is not a universal upgrade option but a strict replacement part. It should only be used in low-beam sockets where the original equipment specification is H11B.

Compatibility & Vital Instructions:

• Sole Application: For low-beam headlights only in specified vehicle models (often US-spec or certain specific models). Never used for fog lights.

• Identification: Inspect the old bulb for a small metal tab (the shield) inside the glass envelope near the filament or on the base. The most reliable method is to check the vehicle’s owner’s manual or parts catalog.

• Purchase & Installation Rule: You must purchase exactly according to the original specification. If the vehicle uses H11B, you must replace it with H11B. Mixing types is incorrect installation.