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#2
07-05-2003, 05:04 AM
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it is good for a guestimate. looks like you might have a gimpy ballast.
realy all lux can accuratly measure is a comparason on the same bulb. so you have kinda done this but you are using different bulbs. I can say it looks like you have a problem because of the extreamly large difference. normaly all you should realy use LUX for is determining how long your bulbs are lasting. you can take a reading after they break in and then check every month and see how fast the intensity drops off. the main problem with LUX is that it is geared for the "Green" spectrum of light so if you try use it to compare different bulbs it is useless unless the bulbs have the exact same spectrum output. Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive. 
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