putting the old sola-glo MVB into the freezer worked . its no longer flickering . I use it for heat as its only putting out around 30-35 MW of uvb at 12'' BUT it keeps his basking area 110-120 with the other two bulbs . I can't find or remember where i read about the freezer trick . But the bulb now comes on every morning like it should , i was going to toss it .