DuroLux DL844E T5 Fluorescent 4Ft 4 Lamps with 6500K and 20000 Lumen Grow Lights All Alum Body provide cool Operation and Light Weight over 50% Full Output to get 20000 Lumens with 6500K Fluorescent Sunlights 3C Receptacle daicy chain and 1 Rocker Switch control light level and 8' 16G Power Cord 4xF54T5HO Tubes included and Strong enough Brown Box with fast shipping! UL Listed and 3 years warranty on ballast and fixture (not including the tubes).