This Wilko Round Energy Saving Bulb offers a more traditionally shaped, eco friendly lighting solution. Provides up to an 80percent saving on energy and lasts up to six years (approximately 6,000 hours). 7 Watts equivalent to a 35W standard bulb. Energy Rating A. 310 Lumen, 240 Volts. E14 Edison Screw Fitting. Non Dimmable. Always read instructions.