Rapid Start Fixtures need a ground to start properly.

They may start without a ground if the current is just beginning to lag, "do you feel lucky today" type of start.

For a good insite on understanding these problems go to http://www.advancetransformer.com/literature/pdf/FLB_Pocket_Guide.pdf

[This message has been edited by LK (edited 12-31-2004).]