This is an 55 watt circular fluorescent bulb with two concentric tubes that is used in a number of desktop lamps and magnifying lamps. The lamp is a T6 (3/4 inch) diameter tube and has a four pin connector with the pins facing out from the lamp at a 90 degree angle. If your old lamp has the four pins at an angle, you may have difficulty installing this bulb. The lamp with angled pins is no longer made. The outside diameter of the lamp is 8-3/8 (8.375) inches. The 2700 degree Kelvin color temperature produces warm white light. It replaces these and other models:
• 29177
• 2CT6
• F2C5527
• FC55/2C/827
• FC55/2C/WW
• F2C5527
• Kichler 4029
• MaxLite 25521
• MaxLite 55W 2C
• MaxLite M25521
• MaxLite SK255RLC
• MaxLite SK255 RLC 2C
• Satco S6596
• SeaGul Lighting 97043
• TCT6
• Westinghouse 552C/E/CD