I had same exact problem. Some of the hardware isn't secured completely in the ballast. Give it a good punch or two while it's plugged in and it will kick the light on.

-on another note, the ballast gets very warm. keep that in mind.
Markass Reviewed by Markass on . help with my light.......PLEASE......... just got my new light from inside sun...... plug it up and the ballast comes on but the lamp will not.. i have tighted the buld as far as im going to... what could be wrong???!!!!! Rating: 5