PENTRON HO ECOLOGIC T5 linear fluorescent lamps offer a high quality lighting solution for applications where aesthetics and/or high lumen output and long life are important. With a small lamp profile of 5/8" and lumen output that is almost twice that of T8 fluorescent lamps, these lamps offer the prospect of small luminaire designs capable of delivering illuminance levels satisfying general ambient lighting requirements ranging from general office and classrooms to industrial manufacturing. Maximum Overall Length (MOL) 33.89" diameter .67". Features a Miniature Bipin Base. 3100 Initial Lumens. 4100K Color Temperature 4100K (CCT).