Hong Kong companies could save up to 30 per cent on their energy and waste-disposal bills by adopting more green friendly practices, according to an environmental technology firm. Technology can lead to a minimum reduction of 25 per cent in the power needed for fluorescent tube lighting, according to executives at Grandy Environmental (HK). The lower amount of electric power required by each firm would have a strong environmental impact, they said. Grandy Environmental senior project manager Christopher Phillips said: 'If the lights are operating 24 hours a day, like they might be in car parks or stairwells, it's also saving something like four tonnes of carbon dioxide per year.' The energy savings are achieved through a device that is installed into the lighting circuits of buildings which reduces the power supplied to burn lights when demand for electricity in the building is low. Grandy charges clients by taking a cut of the savings made from installing the system. 'For the clients it should be a complete no-brainer because all they're doing is they're paying us back for the installation and the device through their savings - so it's actually cash-flow neutral,' Mr Phillips said. Grandy also provides systems to break down unwanted chemicals in waste water by adding enzymes which limits damage to the environment. The company sees strong potential for such technology in Hong Kong as pressure grows on the environment with an increasing population. Hong Kong's population is forecast to grow by two million over the next 15 years to about 8.9 million. Economic growth also contributes to increasing environmental damage as consumption rises. 'As economies get more affluent they start to produce more waste,' Mr Phillips said. Grandy is a small private firm set up in January 1999. It had revenues last year of about HK$12 million, according to managing director Raymond Tsui. The environmental issue has been at the forefront of the Government's agenda in recent years as air pollution worsens. In 2000 the Government spent HK$8.4 billion in all departments on environmental protection.