The energy consumed by an electric device is given by:
\[
E = P \times t
\]
Where:
- \( P = 1000 \, \text{W} \) (power of the bulb),
- \( t = 1 \, \text{hour} = 3600 \, \text{s} \) (time in seconds).
Substituting the values:
\[
E = 1000 \times 3600 = 3,600,000 \, \text{J} = 3.6 \times 10^6 \, \text{J}
\]
(Note: The unit of energy is Joules (J), not Watts (W), as Watt is the unit of power.)
So, the energy consumed by the bulb is 3.6 $\times 10^6$ J.