I'm not or never been a fan of Hamilton products (Chinese made) so it was time to replace my bulb 250w DE in my Giesemann Infiniti, I always ran Giesemann,BLV or Ushio bulbs and figure to try a Hamilton 20k to see if it was a different spctrum of blue vs my Giesemann 20k not because of a $20 price savings. Got the bulb and considering there ballast are cheap and the only available M80 I figured the bulb is made in China also, so after 3 hours later the bulb bulb had shut off and would not re-fire so I pulled it out and found this. There are members who claim how great there crap is and this just proved why I always go out of my way to purchase German or EU made products.