Community associations in Oxfordshire have won a campaign to get cheap low energy lightbulbs.
The county's Green Party group lobbied energy company Powergen to get the same deal as major supermarkets on the subsidised bulbs.
The first groups to benefit will be Low Carbon Wolvercote and the Canalside Environment Group in Oxford.
Campaigners hope the decision will affect groups round the UK who want to help cut energy use.
Chris Goodall, an environmental writer, who led the campaign said: "I was amazed to find that major supermarkets buy energy efficient lightbulbs with a huge subsidy but that community associations were banned from selling the bulbs.
"Local groups are springing up all around the country to help foster low-energy living and they need access to the cheap lightbulbs.
"Lighting is responsible for a significant proportion of damaging carbon dioxide emissions and switching to low energy bulbs can make a real difference."
Powergen agreed to sell the low-energy bulbs to the environmental groups under the same terms as supermarket giant Tesco for a trial period before extending the offer to groups across the UK.
At a Green Living day at St Margaret's Church in Oxford on Saturday the team sold 100 bulbs for between £1 and £2.