The change was part of a major modernisation of the lighthouse. Lamp power was increased from the paraffin lamp's 720,000 candelas to
2,600,000 candelas with the electric lamps, increasing the range by 4 miles to 29 miles. It took 30 minutes to light the vapour lamp burner, and electric lamps were more reliable and required less maintenance. The generators powered other bits of kit as well, notably the drive to the lens rotating system, compressed air fog signals (previously 'tonite' explosive cartridges*), radio communications and RACON radar (previously battery powered) and cooking and heating (previously coal).- formatting link