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Great tip on moving the clips. The bulbs were all used take outs from somewhere. No idea how long they will last. But the the price was right.

Bulbs were a bit shorter and won't reach the clips on the right side. Hopefully that won't be an issue. Easy to swap out and they lit right up. I ran them for awhile to make sure there were no issues. Bulbs were labelled MVR1000 and R1000. No TO's though. I looked in the document pockets.

Thanks for the info, I have read up on ballasts and lamps. The consensus seems to be that a high pressure sodium ballast will start MH lamps but the opposite configuration won't.

Tinstar I have a question about the MH bulbs. I have 5 of these NF2D's where I work. They all run great. I would like to get rid of the sodium bulbs and run 1,000 watt MH bulbs. I have access to a pile of free bulbs. Used but good. Have you had any issues running those with the HPS ballasts?