SpeedMaster Fan Speed Controller Ballast PPFD @ 18" vertical distance:

PPFD @ 18" vertical distance: 428 µmols/m2/s avg - over 4' x 4' area

Integrated backdraft damper to prevent air leakage when the extractor is not operating

and can easily be combined with fertilizers

Also helps to catalyze water and assist the transfer of water elements to specific sites

The OLED display shows precision temperature control that ranges from 248°F to 455°F

SpeedMaster Fan Speed Controller Ballast PPFD @ 18" vertical distance:For use with 120 volt AC equipment or power tools that have a universal brush type motor or a motor that is compatible with a speed controller. Adjustable settings: Full speed, Off and variable speed Controllable from low to high speed Applicable for fan or tools which power is from 500W to 1500W Amps: 15 Voltage: 120v Wattage: 1800 Power cord: 6' Package dimensions: 6. 4" x 4. 9" x 3. 1" Weight: 1lbs