Hi Shango, I agree with Paul it may be the ballast or the connector, but if you want to check the bulb I have some spare 65W PC 4 pins in line, you can have one to test if yours is OK. I live in Lynnwood and I work in Edmonds, let me know if you want one to test your light. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member