The energy spent by the bulb is

w_{b} =24\times 60\times 80=6.912\times 10^{6} J .

Then, assuming g=10m/s^{2} and using   w_{p}=mgh  for the potential energy,

we have  1000\times 10\times h=60912\times 10^{6} \longrightarrow h=691.2m