Philips 22w Master TL5 Circular Cool White 4000k 2GX13 Fluorescent Light Bulb This TL5 Circular Florescent Light Bulb has 22 watts, a 2GX13 base and a color temperature of 4000K. The color temperature releases a cool white light that is perfect for indoor applications such as offices, hotels, homes, restaurants, and more. In addition, this bulb is dimmable and can change the atmosphere of a room with a simple flick of a switch. It has a luminous flux of 1800 which is equivalent to an incandescent bulb of around 120 watts This bulb is florescent meaning it uses 75% less energy and can last up to 10 times longer than incandescent bulbs. It is an ideal replacement for strip lighting as well as the less efficient incandescent light bulb. It lasts an impressive 12000 hours and scores an 85 on the color rendering index (CRI). The TL5 Circular Florescent Light Bulb is not only uniquely shaped with its slim circular appearance, but it has unbelievable color rendering, life rate, and efficiency saving you money, time, and energy.