EasyAssistant Engineer (Electrical), Class-2, Road and Building Department2025✓ Editorially verified

In street lighting, the term 'luminaire' refers to

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Answer & Explanation

Correct AnswerC. The complete lighting fixture including the lamp, housing and reflector

Quick Explanation

A luminaire is the complete lighting unit/fixture: it includes the lamp or LED light source together with housing, optical components, electrical gear/driver and parts needed to distribute, position and protect the light source.

Formula / Key Relation

Luminaire = light source + optics + housing + control gear/driver + supporting fixture parts

Detailed Explanation

Concept & Reasoning

The term is broader than 'lamp.' In modern LED products the source may be integrated and non-replaceable, but the complete fixture remains the luminaire. The supporting pole and underground cable are parts of the lighting installation, not the luminaire itself.

How to Solve It in the Exam

Lamp is inside; luminaire is the whole fixture.

Important Exam Point

Use precise lighting vocabulary in design/specification questions.

Related Revision Path

This question sits in the revision path Building Electrical Services → Lighting → Lighting Terminology .

Quick Trick

Lamp is inside; luminaire is the whole fixture.

Common Mistake

Calling only the bulb the luminaire.

Exam Tip

Use precise lighting vocabulary in design/specification questions.

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Exam Path

Knowledge Path

Study concept · Luminaire →Practice concept Practice topic

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Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 293