Physics · Illumination Engineering
The depreciation factor (or maintenance factor) in illumination engineering mainly accounts for the:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Changes in the colour temperature of the emitted light
- 2Type of ballast used in the circuit
- 3Reduction in lamp light output over time due to aging and dust accumulation✓
- 4Mechanical wear of the luminaire body
Correct answer
Reduction in lamp light output over time due to aging and dust accumulation
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