lumatek used to be very good ballasts back in the day . but have rf radio interfe . used to have to walk down the street 10 houses to use the phone ! lmao people that live near me could never figure why there shit did not work between so and so times . today lumatk makes a ballast called cali its a total piece of shit every one bought gets returned to the hydro stores . lumatek the old blue model with the big fins solid unit but rf noise . i used to ask the people hey your phone working ? mines not lmao . finally had to upgrade . i run a few more then 1 ballast at once so it got bad .