Sunlite 05725-su f16/2d/835/4p 16w fluorescent 2d lamp bulb, gr10q, neutral white the fluorescent 16 watt 3,500k neutral white 2d lamp features a gr10q base, provides a light output of 1,050 lumens at a color rendering index (cri) of 82 and can last an average of 10,000 hours. This lamp has many uses including torchiere floor lamps, portable work lights, and many other applications that require uniform light distribution.