“We suggest that the new model T5 (tube), which uses less glass and mercury, would save up to 40 per cent in electricity in comparison,” said Sun Wai-fung, campaign officer, Green Sense.
JC Decaux Pearl & Dean chiefs declined to comment, but MTR media relations manager James Tsui said: “We do try to be energy conscious - we use energy-saving lightbulbs inside our trains and switch off some escalators in non-peak hours.”
The controversy comes as the MTR launches a new interactive audio and visual shopping guide platform for consumers in key stations.