no buzz on the 5 that i own.
There is no fan in the lumatek ballast!!
dont sound good mate! are you able to return it to the retailer? set up a spare light in the meantime... rather have peace of mind than worry about it!It can't be my bulb because the ballast is outside my room.
Eye, why than ¸everybody I ask if their lumatek ballast are buzzing say 100% no?
Like you say, my ballast make a buzzing sound at the opening and when the temp get higher the sound is smaller. But 1 month ago I could barely notice something...now its not as loud as magnetic but its definately louder than 1 month ago.