The Topcon Perimeter Chart Illumination bulb [40101-20570-LS] is a high-quality replacement bulb designed specifically for Topcon Keratometers. This 6V 3W G3.5 SBP-11 bulb provides excellent illumination for accurate and precise chart readings during eye examinations. With a luminous intensity of 15 lumens, this bulb ensures clear visibility of the chart, allowing for accurate measurements and assessments. It is a reliable and long-lasting solution, ensuring consistent performance and durability. The Topcon Perimeter Chart Illumination bulb [40101-20570-LS] is easy to install, making it convenient for healthcare professionals to replace the bulb when needed. Its compatibility with Topcon Keratometers ensures a seamless fit and optimal functionality. Whether you are a healthcare professional or an individual looking to replace a bulb in your Topcon Keratometer, this product is an ideal choice. It guarantees reliable and efficient chart illumination, contributing to accurate eye examinations and diagnoses.