6pack fluorescent bulb starter for Flowtron,works for 15Watts - 40Watts Compatible with Flowtron BK-15, BK-15D, BK-40,BK-40D,BK-80,BF-190,BK80D,MC9000 FC7600,BF-150,BF35 Starters repairs for ballast,provides the current to start the bulb glowing If fluorescent bulb keep flickering, bulb lights at one end only, or fluorescent tube lights at the ends only but not in the middle, Please replacing fluorescent starters 6pack fluorescent bulb starter for Flowtron,works for 15Watts - 40Watts,compatible with Flowtron BK-15, BK-15D, BK-40,BK-40D,BK-80,BF-190,BK80D,MC9000 FC7600,BF-150,BF35.