Journal of Failure Analysis and Prevention

, Volume 7, Issue 6, pp 419–423 | Cite as

Renewal Rate of Filament Lamps: Theory and Experiment

  • V. J. Menon
  • D. C. Agrawal
Case History


We calculate the renewal rate of fused lamps in an organization having large installation of filament lamps. This is achieved by using the standard mortality curve over the specified fractions of the half-life and setting up an algebraic relation for the renewed fraction at successive stages. The procedure for data analysis is described in detail for an actual experiment performed by us.


Tungsten Filament lamps Large installation Failure Mortality curve Renewal rate Theory Experiment 



VJM thanks the University Grants Commission for financial support.


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Copyright information

© ASM International 2007

Authors and Affiliations

  1. 1.Department of PhysicsBanaras Hindu UniversityVaranasiIndia
  2. 2.Department of Farm EngineeringBanaras Hindu UniversityVaranasiIndia

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