Xtreme Gardening MYKOS ROOT PAKS great for hydro 500 ct, 2 cs (Special Order Only) trimming equipment Resistant and lightproof zippers gavita Resistant and lightproof zippers DESIGNED TO WORK WITH B Lite Master Zone Controller (Not Included)FEATURESDimmable Settings (200W 350W 450W 660W)Advanced Dimmable feature with Use of External B Lite Master Zone Controller (1W 660W)Automatic Frequency AdjustmentFull Circuit ProtectionRF ShieldingTECHNICAL SPECIFICATIONSInput Voltage: 100V 277VACInput Power: 660WPower Factor: 120VAC Full Load =90%PPF: 1700 µmol sEfficacy: 2 The microbes inside each pak benefit plants by creating a "sponge like" mass which collects and stores nutrients and water Each pak holds 10 grams of pure mycorrhizal inoculant