You can greatly reduce your heating bills by using low-energy heaters.使用低耗能取暖器就可以大幅度降低暖气费。A low-energy bulb would be quite sufficient and would not obtrude.一个低度数的灯泡就够亮了，而且不会晃眼。After our eco-audit, we switched to low-energy light bulbs.生态审查以后，我们改用能耗低的灯泡。