GEs amazing Arcstream!

My all time favourite style of metal halide lamps!, however I'd almost given up on this lamp!, but I dug it out of a very dusty box in the loft, where it's sat, unlit since January 2005!, this has to have 5000 of its 6000hr specified life on it now?, note, (for those of us familiar with this lamp), how it has corroded the tiny balls from the end of the electrode shanks away!