?Pack of 6?: 17 watt 24 inch 2 ft T8 g13 linear fluorescent tube light bulb cool white 4100k. ?Cool White?: F17T8/841 2 feet 17W 4100K bulb CRI 83, 1400 lumens, bright light, long lifespan 16,000 hours, 6 count inside. ?F17T8 Fluorescent Tube 2 Ft?: G13 Medium Bi-Pin cap, 2 foot 17w 24 inch t8 fluorescent tube light bulb. ?Replacement Linear Fluorescent Bulbs?: Widely use for commercial and industrial applications, compatible with cir cle 6 pack f17t8/841 17w 24 inch t8 fluorescent tube light bulb. ?After-sale Service?: please check the fixture if the fluorescent bulbs can not work. If got broken tubes, please contact with us to get replacement. we support 7/24 services.