They have Magnetic Ballasts with a separate Valve Starting Switch. Also known as Switchstart ("Preheat" if you're from North America). The first tubes on my dining table are ones that still worked and they are two Osram Whites that are from 2004. One is from 2008 and is a GE Polylux Warm White which is although supposed to last 20000 hours, its old Ballast had difficulty starting it but it hasn't reached EOL yet (but see the Blink Happy video - it's the same one). The dark one is from 2000 (oldest of all on the table) and it is a Sylvania Standard White that still worked on this video but as of March 2011, it is at EOL and one of its filaments broke. There are two working F8T5s in the background; one in my Kitchen and one in my Laundry Boiler Room and are GE Polylux Extra Warm Whites. One from 2006 and the other from 2007. The first EOL tube is a Homebase Own White which had the shortest life expectancy (7000 hours) of all F18T8s and was brand new in 2006 and is above the Kettle, the scecond is obove the Microwave and is a GE Warm White from 2003. The third is the same as the second and is above the Bread Maker and Slow Cooker. The fourth is the oldest EOL F18T8 of all from 2000 and is a Sylvania Standard White in my Laundry Boiler Room. As I was going upstairs, sorry about the Christmas Decorations (look at the Record Date), and the last EOL one is from 2006, a GE Polylux Warm White, and the last one of all F18T8s was a GE Polylux Warm White from 2007. The ending ...
Keywords: Switchstart, Preheat, Fluorescent, Lamp, Magnetic, Ballast, F18T8, EOL, Blink, Flash, Flicker, 18 Watt, End of Life
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