LED T8 48 Inch InstantFit 3500K 16.5W Philips Dimmable InstantFit 463133. This lamp fits into your existing fixture and replaces a 48 inch fluorescent tube. 2500 lumens, 80 CRI 70,000 hour rated. Operates on approved ballast only. Manufacturer Product Code - 929001226704 This is a plastic tube shroud and is safe in food or shatterproof applications. Philips InstantFit plug-and-play replacement lamps work on most instant start electronic T8 ballast. The ballast does not need to be removed! Simply turn off the power, remove the fluorescent T8 lamp and insert the new InstantFit LED T8! These lamps will not work on rapid start or T12 fluorescent systems. Please call if you have any questions!