GTI Fluorescent Replacement Lamps 60in - F40T8/GL50

F40T8/GL50 - GTI T8 d50 Replacement Bulbs GTI GraphicLite 5000K lamps The precise spectral characteristics and lumen output are subject to an exhaustive quality control process to assure that each lamp provides true full-spectrum, color balanced illumination and extremely accurate color rendition.   The model number of the bulbs contain the size, wattage and type. For example: When looking at the model # F40T8/GL50. The first number 40 is equal to the wattage, T8 refers to the size of the bulb (1.0" Diameter), and finally the GL50 refers to the type, in this case the GraphicLite 5000.   The T12 bulbs have a 1.5 inch Diameter Model Watts Length F11T8/GL50 11 watts 15" (38 cm) F15T8/GL50 15 watts 18" (46 cm) F17T8/GL50 17 watts 24" (61 cm) F25T8/GL50 25 watts 36" (91 cm) F32T8/GL50 32 watts 48" (122 cm) F40T8/GL50 40 watts 60" (152 cm) F58T8/GL50 58 watts 60" (152 cm)