I am selling 2 used PFO MH 175W Ballast for fish tank / grow lights. Total power is 175 Watts. please email ltrickel@yahoo.com or call 503-308-2849 Description Features 120V 6 foot supply cord for each ballast Extruded aluminum heat sink enclosure for maximum heat dissipation Each ballast can be controlled by independent timers Each ballast has an independent on-off switch Quick disconnect for maximum versatility in socket mounting configurations Probe start magnetic ballast Ballasts enclosed in an aluminum housing which helps dissipate heat. The plugs and quick disconnects on the PFO ballasts are standard. If you want to upgrade or downgrade the lighting intensity, all you have to do is purchase a new ballast and bulb, and you are all set. No need to send your entire system back to the manufacture and no cumbersome rewiring neccessary. Dimensions: 8.5"L x 7.5"W x 6.25"H $50 each or $75 for the pair. these are $125 new here http://www.marinedepot.com/ps_ViewItem~idProduct~PF1411.html oregon