The SATCO T5 high output fluorescent lamps give off roughly twice the light output of standard T8 bulbs. These lamps are suitable for use in high-ceiling applications, along with fixtures in T-grid ceilings. Our T5 HO lamps offer superior quality color and advanced lumen maintenance over time.|The SATCO S8145 T5 high output fluorescent lamp gives off roughly twice the light output of standard T8 bulbs. This lamp is suitable for use in high-ceiling applications, along with fixtures in T-grid ceilings. Our T5 HO lamp offers superior quality color and advanced lumen maintenance over time.