Secretary for the Environment Edward Yau Tang-wah says the government is willing to listen to the public's views on its plan to distribute coupons to promote use of energy-saving light bulbs. Critics say the scheme is ill thought out and want the Environment Bureau to modify it. Chief Executive Donald Tsang Yam-kuen unveiled the scheme in his policy address two weeks ago. Asked yesterday if the proposal had been too rushed, the minister said: 'I think it is worth gathering more views, as this is not only a policy but an issue for society.' Under the HK$240 million scheme, all power users would have to pay an extra 0.5 HK cents to 0.6 cents per kilowatt-hour of electricity they use next year to finance the distribution of HK$100 coupons to 2.4 million residential power users for the purchase of energy-efficient bulbs. The Legislative Council's panel on environment affairs will discuss the government's proposal on Monday. The Democratic Party yesterday wrote to the chief executive for a second time to demand he appear before Legco to answer criticism that the scheme favours his elder son's father-in-law, a major distributor of Philips light bulbs, saying he should have revealed this through a declaration of interest to the Executive Council. Philips dominates the market for energy-efficient light bulbs. Legco yesterday began a three-day debate on the policy address, but lawmakers' focus was still on Tsang's comments on Tuesday when he defended himself against media reports about the light-bulb controversy and a sister-in-law's early reimbursement for losses on Lehman Brothers minibonds. Critics want to know whether Tsang helped her; he says he was unaware she had sought a legislator's help in her dealings with the issuing bank. Pro-establishment lawmakers came to the chief executive's defence, criticising the media for implying wrongdoing without evidence and saying speculative reporting was not in the public interest. However, Democratic Party member Kam Nai-wai said it was understandable that Lehman investors were outraged to learn a relative of Tsang's was able to obtain a good settlement months before anybody else. On Tuesday, he said he did not think Tsang's sister-in-law, Lam Suk-jing, had received preferential treatment. In December, Kam announced that his party had helped more than 60 minibond holders get full or partial reimbursements from banks.