Dataset from:
    
V.J. Menon and D.C. Agrawal,  Renewal Rate of Filament Lamps: 
Theory and Experiment. Journal of Failure Analysis and Prevention. 
December 2007, p. 421, Table 2/
DOI: 10.1007/s11668-007-9074-9

Description:

An assembly of 50 new Philips (India) lamps with the 
rating 40 W, 220 V (AC) was taken and installed in the horizontal 
orientation and uniformly distributed over a lab area 11 m 9 7 m. 

The assembly was monitored at regular intervals of 12 h to
look for failures. The instants of recorded failures were
called t‘ and a total of 32 data points were obtained such
that even the last bulb failed. 

Variables:

i - observation number
h - time in hours since experiment start
f - number of failed lamps at particular time h
K - number of surviving lamps  at particular time h

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