SGL [4pcs]UL Listed 48" 4ft 22 watt (48W equivalent) Daylight White T8 5000-5500k G13 LED Tube light ceiling lighting tubes Light output 2310 lumens only use 22watts(Replace 48W fluorescent tube light), Save 54% on electricity bill of lighting comparing with the fluorescent light Available with a CRI of 80 to 83,dramatically improve the appearance of products by allowing colors to appear clear, vivid and distinguishable The led tube features quick start and does not need electric fluorescent starter or ballast, they waste power and create unwanted heat International standard shape for T8 tube light-4ft, Easily fitted instead of traditional fluorescent tube lamps UL/cUL-listed, DLC-qualified,CE-compliant, High safety is no doubt assured