Overview
IEC TR 60887:2010 is an International Electrotechnical Commission (IEC) technical report that establishes a standardized glass bulb designation system for electric lamps. Its purpose is to provide a clear, internationally recognized nomenclature for identifying the shapes and dimensions of glass bulbs used as envelopes in finished electric lamps. The 2010 edition is the third revision, updating prior versions by adding new bulb type designations and drawings.
This system enables manufacturers, suppliers, and end-users to communicate precisely about lamp envelope types, ensuring compatibility and aiding in product specification and quality control.
Key Topics
Glass Bulb Designation Structure
- Letter symbols: Indicate bulb shape, composed of up to three letters representing either a basic shape or combined with one or more modifiers.
- Number symbols: Specify the major bulb diameter in millimeters for standard shapes, or two dimensions separated by a multiplication sign (×) for rectangular bulbs.
Bulb Shape Classification
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Basic Shapes
- A (Standard with spherical end and smooth neck transition)
- B (Bulged, often with candle-like curve)
- C (Conical or near-conical end)
- E (Elliptical sides)
- F (Flame shape with irregular flutes)
- G (Globular - essentially spherical)
- K (Conical transitional neck)
- M (Mushroom dome shape)
- P (Spherical end with conical mid-section)
- R (Reflector bulbs with parabolic/elliptical section)
- S (Straight-sided with conical lower section)
- T (Tubular cylindrical shape)
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Modifiers
- Angular tips, conical lower sections, dimples, twisting flutes, lens ends, tubular neck components, among others, refine basic shape symbols to capture variations.
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Special Shapes
- PAR: Parabolic aluminized reflector bulbs combining shaped reflector and lens components.
- REC: Rectangular face bulbs identified by width × length.
- MR: Multifaceted reflector bulbs, often used with tungsten-halogen lamps.
Dimensions and Units
- Bulb diameters and dimensions are standardized in millimeters to encourage international consistency, moving away from inch-based systems.
Application of the Designations
- Descriptions are used primarily for finished lamps, aiding in identification, specification sheets, manufacturing, and procurement processes.
Applications
- Lamp Design and Manufacturing: Allows designers to specify bulb shapes precisely for lamp envelopes to meet functional and aesthetic requirements.
- Supply Chain and Procurement: Facilitates clear communication between suppliers and buyers globally to guarantee the correct bulb types.
- Technical Documentation: Standardized designations improve clarity in technical manuals, catalogs, and compliance documentation.
- Quality Control and Testing: Supports consistent verification of bulb dimensions and shapes during production and certification.
- Lighting Industry Innovation: New bulb types can be easily integrated into the system, promoting innovation and standard conformity.
Related Standards
- IEC TR 60887 complements other IEC standards related to lamp performance, safety, and testing methods.
- Coordination with ISO standards on product designation and international measurement systems ensures global interoperability.
- Reference to IEC 34 technical committee publications, which cover broader lamp and related equipment standards.
By adopting IEC TR 60887:2010, stakeholders in the lighting industry benefit from a coherent, practical, and internationally harmonized system that enhances product clarity, reduces miscommunication, and supports global trade and compliance in electric lamps.