Bulb is the UK's biggest green energy supplier. We’re one of the cheapest suppliers on the market, renewable or not. In fact, Bulb is up to £254 cheaper than companies like Npower and British Gas. Every year, the average Bulb member saves 3.5 tonnes of CO2 from entering the atmosphere. That’s like planting 1770 trees. And we’ll give you £50 credit when you sign up with Totum.