Sunblaster, 4', 54W, 6,400 Kelvin Color Temperature, T5HO Lamp, Includes T5HO Electronic Ballast, Power Cord & Jumper Plug, With Both Hanging & Flat Surface Mounting Clips, Fixtures Can Link Together, Regardless Of Length, To A Maximum Of 8 Per Single Power Cord, Reflector Produces More Light, Spreads It Wider Across The Plant Canopy, & Deeper Into The Plant Foliage, Without Consuming Any Additional Power.