HIGH LIGHT OUTPUT: 20000 Lumen, Professional Grow Lighting System, 95% Reectivity German Hammer-tone Reector. 30% more light output vs comparable systems.ALL ACCESSORIES INCLUDED: Qty4 6500K 4ft Lamps, Hanging hooks and chains, 8 FT Power cord.OUTLET ON FIXTURE - Power up to 5 xtures o one wall outlet - less clutter, more convenience.FLEXIBLE LIGHT OUTPUT: 2 switches on body allow for step dimming - one for inner 2 bulbs, another for outer 2 bulbs.SAFE OPERATION: Rated for operation in Wet/Damp environments. Has Made-In- Italy AAG Stucchi lampholder with I certicate to prevent re if tubes get loosed during operation, UL/CUL safety approved. 5 year warranty