I thought so. I'm having problems getting 2x250w radiums to fire up. The Phoenix 14k work fine so I know it's not my wiring. The back of the ballast says: 250w HQI double ended use only ANSI m80. Does that mean it will only work on double ended radiums?
I just remembered that you could try this . Unplug the ballasts . Remove the radiums and try to use a chopstick or a flat screwdriver and slightly bend the contact tab (thingy in the middle of the socket) .U bend it outwards towards the open end of the socket . Sometimes a bulb does not make good contact with the mogul and may not fire .
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