hps light problems

  1. M

    My MH and HPS are showing no lumens

    I have a 400w metal halide light and a 1000 w hps light. I can use both with 1 ballast. When I put my light sensor under each one it shows that they are producing 0 lumens for my and 200 for the hps. When I place the tool under my cfl lights it goes to the max reading when im next to the light...
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