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Green energy all round 

We supply renewable electricity to every member, on every tariff. And we carbon offset our gas, too. That means you can shrink your home’s carbon footprint, just by being with Bulb. In fact, the average member lowers their carbon impact by a whopping 3.2 tonnes of CO2e every year, compared to an average energy tariff. (And your lightbulbs won’t even notice the difference.)


Illustration of a pink sunshine.

100% renewable electricity

We buy some of our electricity (about 4.5%) straight from renewable generators around the UK. And we buy the rest on the wholesale energy market. For every unit of electricity our members use, we buy a renewable generation certificate (called a REGO) to match. We like to think of it as a fair balance between what’s good for the planet, and good for your pocket.

REGO certificates help us verify the amount of renewable energy we supply to the industry regulator, Ofgem. Every year, like all suppliers, we report on the amount of electricity we've purchased from which source: coal, gas, nuclear and renewables. For Bulb, it's simple: 100% of our electricity comes from renewable sources like solar, wind and hydro.



Illustration of a pink gas flame.

We carbon offset all our gas 

Around 3% of our gas comes from renewable sources like food or farm waste, and we buy the rest from the wholesale market. 

To balance out the impact of the gas we supply, we add up the carbon footprint of all the gas our members use. Then we buy offsets to fund projects that cut emissions in the atmosphere by the same amount.

Every carbon offset certificate we buy is verified by one of three internationally-recognised standards: the Gold Standard, the Verified Carbon Standard or the UNFCCC's Clean Development Mechanism. These organisations make sure carbon reduction projects have a robust audit trail, and that carbon savings are long-lasting and additional to what would have happened anyway.

Offsetting won't solve the climate crisis on its own. But we see it as a way of taking responsibility for the emissions we create, until there’s a way to supply energy with no emissions at all.