An arc lamp requires a direct current of

An arc lamp requires a direct current of $10 \mathrm{~A}$ at $80 \mathrm{~V}$ to function. If it is connected to a $220 \mathrm{~V}(\mathrm{rms}$ ), $50 \mathrm{~Hz}$ AC supply, the series inductor needed for it to work is close to :-