All-Glass Aquarium Fluorescent Starter (0.75"Diameter; FS-4)

All-Glass Aquarium 2-pack Fluorescent Starter is UL listed for safety. Replacing a starter is recommended if the tube is not completely lit or continues to flicker. If the tube is discolored on the ends, then replace the tube. For use with 30 watt 36" tubes or 40 watt 48" inch tubes.