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Re: MH bulb service life
> Date: Thu, 20 Jul 2000 13:36:41 -0700
> From: Ted Backman <tedb at valvesoftware_com>
> So, in trying to figure out why my tenellus is slowing down, I realized that
> I've had my current bulb (6500k iwasaki) running for about a year. I looked
> through the archives and the manufacturer's home page, but to no avail.
> Anyone have experience or hard data about the service life of these bulbs?
> I'm using a 250 watt bulb in the champion lighting default ballast/pendant
I don't have data for that specific bulb but have measured intensity vs time for
a plain old 175w 5500K Venture MH bulb. See
and check out "Measured Bulb Data - Part 1"
George Booth in Ft. Collins, Colorado (booth at frii_com)