Europe started eradicating traditional energy-guzzling light bulbs on Tuesday, angering some consumers who had grown attached to their warm glow and cheap price.
The move was part of European Union efforts to boost energy efficiency by a fifth by 2020 in the fight against global warming and to cut dependency on costly gas imports for electricity production.
Factories must immediately stop producing frosted incandescent bulbs and the least efficient 100-watt clear bulbs, but shops will be allowed to sell bulbs already in stock.
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