Please note that we have temporarily paused our iconic Underground Tours until April 2025, to install a brand new winding engine. The Museum remains open with a brand-new Time Tunnel experience now bookable. Underground Tours can now be booked and will be back on 2 April 2025.
The ADC 3 was a high-candle-power lamp made in Leeds by Hailwood and Ackroyd. Introduced in 1934, the shape and green colour of the ADC No.3 makes it quite distinct from other lamps.
