Bulb, is a privately financed energy supply company operating in the United Kingdom, Texas, Spain, and France. Bulb is based in London. Bulb began trading in August 2015, buying and selling electricity and gas to supply domestic properties. It is one of over 70 smaller energy companies competing with the “Big Six energy suppliers” which dominate the UK market. Bulb competes on price, offering a single variable tariff. It supplies 100% renewable electricity and 100% carbon neutral gas. Attracting venture capital, Bulb runs at a financial loss while achieving rapid growth in customers.