18 Watt LED Tube, Drop-In Replaces Standard (T8) 32 Watt Fluorescent Tubes for Electronic Ballast, 4 Ft, 5000K, Frosted, 1830 Lumens, 1-Pack Compatible with existing instant start ballasts eliminating the need for rewiring and allows fixture to maintain original UL Compliance Drop-In Replacement for Easy Conversion to LED - No Wiring Required Durable Construction -Long Life Reduces Replacement Costs Instant-On - No Flicker or Buzzing Reduces your bulb lighting portion of your Electric Bill by as much as 44%