Buy to replace my defective slim ballasts which had already 5 years (at the time but paying with 100 bulbs). I am satisfied, nothing to report. I have not installed the bulbs 8000k because I had in my possession. I hope these last as long ballasts me despite the lower price than my first.
THE EDIT 26/01/2015: 1 Ballast HS. Back in progress ... Finally they will not last as long as the first that I bought! Less than 3 months for those.
In view of the comments and most recent purchase buy this product is a lottery game!
