Save when buying in bulk! 25 pack of Sylvania 40693 SubstiTUBE T8 Type A Ballast Compatible LED tubes. The Sylvania LED13T8L48FGDIM841SUBG9 dimmable T8 LED tube is double-end powered using 13 watts providing a natural white light (4100K) for applications between 120 to 347 volts. Also known as a plug and play tube, the Sylvania SubstiTUBE IPS product line is a 48" linear tube made for direct replacement of T8 fluorescent lamps. The LED linear lamp feature a frosted glass lens, an impressive 120 lumens per watt, 50,000 hours lifespan, and a 5 year warranty.