The OttLite 24 watt replacement tube delivers the right mix of brightness and contrast to bring true colors and comfortable clarity to your world so you can enjoy your time even more. You’ll see colors accurately and fine print and details with ease under this unique low heat, low glare illumination that helps reduce eyestrain. Details: The 24W replacement tube is approximately 12.75" longFor use only as a replacement bulb with specific OttLite lamps True colors, clear details and reduced eyestrain Low-heat, low-glare illumination Energy efficient bulb rated to last up to 10,000 hours (Replacement bulb type C) Model Number: B24553 Note: Please check your lamp's packaging to determine the correct replacement bulb.