A team of 30 telephone operators work non-stop for the Netherland's National Ideas Line, recording and assessing creative ideas. More than 1,500 ideas were logged in its first two years of operation and a large number of them have been labelled "viable" or inspired. The ideas are rated according to originality, commercial potential, cost, and social and political consequences. The better ones are then passed on to potential backers and the ideas Line takes a percentage from those developed, as is likely with an energy-saving light bulb which changes colour as use increases or decreases. Other ideas include a new anti-gambling programme, an anonymous line on which workers could report dangerous or unhealthy working practices without risking intimidation, and a "green" card that would give shoppers discounts at large stores if they used public transport.