About this item

• Crafted to Illuminate Your Space with Natural Light: Read instructions, books, and details of your projects effortlessly and comfortably under this gentle, glare-free illumination that reveals colors with remarkable precision. OttLite bulbs are uniquely engineered to replicate natural daylight within your home, minimizing eye strain so you can enjoy your favorite activities for extended periods.
• A Healthier Way to See: Since its founding in 1989 by photobiologist and natural light research pioneer Dr. Ott, OttLite has focused on developing healthy, natural lighting that helps people see everything more clearly. Today, we continue to bring Dr. Ott’s work to life by pioneering advancements in health-focused lighting technology.
• Energy Efficient: The output of a 13-watt OttLite bulb is roughly equivalent to that of a 60-watt incandescent bulb. This light bulb is rated to last up to 10,000 hours.
• Confirm This is the Bulb You Need: Look at your current bulb and see if model number T1333E, Z17113, 7T13CH-CE, B413SP, 7T13CH-SE, T59J33, ZRS113-CA, T13WLE, or PL13-E is marked at the base. This replacement tube is approximately 7in long. Measure your shade and/or the bulb you’re replacing to check the length. If it’s longer than 7in, you will need a different bulb.
• ONLY for OttLite 13W Lamps Purchased AFTER 2008: The OttLite 13-Watt Replacement Tube with Electronic Ballast Type E is designed only for OttLite lamps purchased AFTER 2008. If you purchased your lamp before 2008, you need the older tube with a magnetic ballast (Type A). Includes 1 bulb.