This product is a halogen light source with specific specifications, widely used in professional and commercial fields that require compact, high-brightness illumination.

1. Core Specifications Analysis

• Model: 887

  • "887" is the model code uniquely identifying this bulb in manufacturer catalogs and the market. Unlike common automotive bulb types (e.g., H1, H7), the "887" belongs to a group of models often used in specialized equipment such as projectors, stage lights, and small searchlights.

• Base Type: PG13

  • This refers to the bulb's cap interface standard. "PG" stands for Prefocus Glass, and the number "13" indicates a cap diameter of approximately 13mm.

  • Key Feature: The PG base is ingeniously designed with flanges or bayonets that ensure the bulb is precisely fixed at the same optical focal point every time it is installed. This is crucial for optical systems (e.g., projectors, spotlights) to maintain consistent beam pattern and focusing performance, preventing light scattering due to installation misalignment.

• Electrical Parameters: 12V 50W

  • 12V: Indicates its rated operating voltage is 12 Volts DC. It must be used within a 12V DC power system, commonly found in automobiles, boats, low-voltage lighting systems, or devices powered by dedicated transformers/power adapters. Direct connection to 220V mains electricity will cause instant burnout.

  • 50W: Indicates its rated power is 50 Watts. At 12V, it draws approximately 4.17 Amps of current (Calculation: 50W / 12V ≈ 4.17A). The 50W rating provides high luminous flux (brightness) while maintaining moderate requirements for heat dissipation and power supply compared to higher-wattage bulbs.

• Technology Type: Halogen Lamp

  • This is an enhanced technology based on incandescent lamps. The bulb is filled with halogen gas (e.g., iodine, bromine). Through the "halogen cycle," it effectively slows tungsten filament evaporation and redeposits evaporated tungsten back onto the filament.

  • Advantages:

    • Excellent Color Rendering: Light closely resembles natural daylight, accurately rendering object colors.

    • Instant On: Reaches full brightness immediately upon powering, with no delay.

    • Simple Construction, Lower Cost.

    • Stable Light Output: Brightness does not significantly diminish over its lifespan.

2. Key Features and Advantages

• High Brightness & Precise Light Distribution: The 50W power combined with halogen technology produces a concentrated, bright white light. The prefocus nature of the PG13 base ensures precise optical control.

• Long Lifespan & Stability: The halogen cycle grants it a longer lifespan than standard incandescent bulbs, offering reliable operation under rated voltage.

• Broad Compatibility: As a standard model, 887 bulbs from different brands are generally interchangeable, making them easy to source and replace.

3. Typical Application Scenarios

• Professional AV & Projection Equipment: A classic application, commonly used as the light source in older or specific models of LCD/DLP projectors and film projectors.

• Stage & Entertainment Lighting: Used in small follow spots, effect lights, moving head lights, and other equipment requiring a high-brightness point source.

• Special Vehicles & Work Lighting: e.g., cabin roof lights or work area lights for construction vehicles, agricultural machinery.

• Low-Voltage Display Lighting: Some low-voltage halogen spotlights for shop windows or museum display cases.

• Marine & Outdoor Lighting: Small marine searchlights or high-brightness camp work lights.

4. Usage and Replacement Precautions

1. Voltage Match: Always ensure the power supply is DC 12V. Never connect directly to AC mains electricity.

2. Handle with Care (No-Touch Rule): Avoid touching the bulb's glass envelope with bare hands during installation. Skin oils can carbonize under high heat, causing localized overheating, severely reducing bulb life, or even causing rupture. Use a clean soft cloth or gloves for handling.

3. Heat Dissipation: Ensure the fixture has proper heat dissipation and adequate ventilation. Excessive heat is the primary factor reducing halogen lamp lifespan.

4. Power Off Safely: Always switch off the power and allow the bulb to cool completely before replacement to prevent burns or electric shock.

5. Disposal: Spent halogen bulbs should be disposed of as general solid waste, separate from ordinary glass in household trash.