Helical 27W, 120Vac 60 Hz 424 mA. Energy saving bulb. To save energy costs, find the bulbs with the light output you need, then choose the one with the lowest watts. Use only on 120V 60 hertz circuits. This product complies with part 18 of the FCC Rules but may cause interference to radios, televisions, wireless telephones and remote controls. Avoid placing this product near these devices. If interference occurs, move product away from the device or plug either into a different outlet. Do not install this product near maritime safety equipment or communication equipment operating between 0.45-30 MHz.