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Need recommendation: Best strobe light for testing?

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Hello all,
I think this is the right forum to post this to. I'm looking for a serious strobe light for setting the speed on my VPI Turntable SDS. I know that suggests a post to Vinyl Asylum, but I want advice from the electrical pros on this one. I'll ask where to get a marked table mat in Vinyl Asylum :)
I am looking for a precision instrument. I'm concerned that one that plugs into the wall will be susceptible to frequency variations in the power supply from the wall socket. How do the best strobe lights control this? I suppose if they convert to DC in the power supply it shouldn't be an issue, though, should it? Still, it is my suspicion that some lesser models just use the power source frequency as a starting point? I don't know - that's why I'm posting.
I don't need to spend mega-dollars if a top quality precision product can be had for 50 bucks. But I have recently learned just how tiny a speed error has to be on a good turntable for the results to be audible. And also how hard (and frustrating) it is to try to tweak it by ear.
Any suggestions are very welcome. All the best,
ccm

Follow Ups:

Don't worry - unclestu52 00:58:20 05/14/07 (0)
about the AC frequency fluctuation. IIRC the government has very strict regulations about maintaining the 60HZ AC. If the frequency were to be off even slightly, the various feeder plants would cause cancellation and loss of power. IIRC, the figure was .1% or less. Even the clock chips in your digital appliances reference the 60HZ AC frequency, subdividing it into 36K and then counting the divisions to get your seconds, minutes and hours.
Besides, many TT's use an AC motor any way and the reference is again to the 60 HZ standard (or 50 HZ if you live outside of North America).
Stu
Here's the ONE - jhorowitz128 21:35:18 05/13/07 (6)
KAB SpeedStrobe
- KAB SpeedStrobe (Open in New Window)
- Ditto that ! /nt - T-Rex 07:14:16 05/28/07 (0)
  -T
- Re: Here's the ONE - Coffeecupman 21:45:46 05/13/07 (4)
  Oh, SWEET!
  Thanks for that, jhorowitz! You've made me a very happy sailor! And I was going to make an AS order, anyway!
  ccm
  - Enjoy!....nt - jhorowitz128 23:27:46 05/13/07 (3)
    nt
    - Look .... up in the sky! - Elmo 05:47:57 05/14/07 (2)
      It's a bird,
      It's a plane (Open in New Window)
      - Re: Look .... up in the sky! - jhorowitz128 06:03:13 05/14/07 (1)
        
        In Reply to: Look .... up in the sky! posted by Elmo on May 14, 2007 at 05:47:57:
        
        Couldn't leave well enough alone, huh?
        LOL!
        
        Well you know someone, somewhere .... - Elmo 07:24:57 05/14/07 (0)
        
        In Reply to: Re: Look .... up in the sky! posted by jhorowitz128 on May 14, 2007 at 06:03:13:
        
        With four hundred clams in their pocket. Are saying to themselves right now: "I gotta get me one of those."
        An old paper stobe disc, a length of lamp cord, and a Radio Shack two dollar chassis mount neon bulb work for me.
        Now perhaps a new listening chair?
        Related thread 2: http://db.audioasylum.com/cgi/m.mpl?forum=vinyl&n=630033
        
        Related thread 1 ... (Open in New Window)

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