I have often heard the T8 bulb mentioned as a bright light. Yesterday I helped a friend install a new kitchen fixture that used 4, 4' T8 tubes. I was surprised at their small diameter compared to a standard sized florescent bulb. I also noticed that the ballast had a T8 label on it. The kitchen lit up quite brightly and we were impressed.
My question, can these T8 bulbs be used in a standard florescent fixture or do I need to buy new fixtures? My shop lights are needing to be thumped to come on and I am thinking about replacing them.