You can be extremely strong, but not convert it to power.

It was converted to solar power on 8 August 1990.

The lighthouse was later converted to solar power in 1975.

The station was then converted to solar power on the 20 September 2000.

The light was converted to solar power in January 2001.

The pump is still in use today although converted to electric power.

This solar panel converts the light into electrical energy to power the watch.

At that point, the press was converted to electrical power.

Work started to convert the corporation's lines to electric power in 1898.

At some point the vessel was converted to diesel power.