Ushio BC8812 F21T5/830, 34" Fluorescent Ushio's ultra 5Tm fluorescent lamps were designed to provide the greatest lumen Package in the shortest possible linear tube Energy efficiency - a system utilizing ultra 5Tm lamps can deliver up to 104 lpw, thus outperforming standard T8 systems (90 lpw) and T12 systems (66 lpw) Used by psychedelic shops for Lighting fluorescent posters, displays, etc 25 pk - ushio 21W 34in T5 G5 3000K fluorescent linear tube light Base: G5, rated life (hours): 35000