I HAVE A 250 X 2 MH SET UP FROM HAMILTON TECHNOLOGY A FRIEND OF MINE GAVE THEM TO ME HE SAYS THEY ARE ABOUT 8 YEARS OLD. THEY WORK I TESTED THEM FOR LIKE A HALF HOUR. HOW LONG IS A LIGHT SYSTEM LIKE THIS LAST (YEARS?). I NOW BULBS AND THAT NEED TO BE REPLACED. I GUESS WHAT I MEAN IS DO BALLAST LAST ALONG TIME OR SHOULD I BE WORRIED OF A SHORT OR FIRE CAUSED BY THEM BECAUSE IT IS AN OLDER SYSTEM. FROM WHAT IM TOLD THEY TYPICALLY WORK OR THEY DONT. ALL THE WIRING AND MOGAL ENDS ARE IN EXCELENT SHAPE I OPENED THE BALLAST CASE AND THE BALLAST LOOK LIKE NORMAL BALLASTS THEY SAY ADVANCED SOMTHING COMPANY ON THEM. PLEASE LET ME NOW YOUR THOUGHTS ON THIS. I AM TYPICALLY PARINOID. JUST MY NATURE THANKS