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 Post subject: GIA Utility Lamp
PostPosted: Sat Jan 29, 2011 3:16 pm 
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Location: Sweden
Here for you who are looking for a good light source to the refractometer and polariscope in one piece.

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Conny Forsberg


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 Post subject: Re: GIA Utility Lamp
PostPosted: Sun Jan 30, 2011 5:57 pm 
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"but the top lens has a hairline crack on one edge but is not loose"

Will this effect the readings in a refractometer or would it just be a cosmetic issue.

If it needs to be fixed, how much do you think it would cost to replace?


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 Post subject: Re: GIA Utility Lamp
PostPosted: Sun Jan 30, 2011 6:12 pm 
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The top light is not used for refractometer readings so no problem there. Replacement would be a white frosted glass disc. The "yellow filter" used for the refractometer readings is of more importance.

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 Post subject: Re: GIA Utility Lamp
PostPosted: Sun Jan 30, 2011 6:14 pm 
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Great, Thanks.

So I could leave that lense cracked and still get accurate readings.


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 Post subject: Re: GIA Utility Lamp
PostPosted: Sun Jan 30, 2011 6:16 pm 
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The top lens is not important. What is important is the orange lens which sounds like its OK. I would not pay more than about $50.00 for one of these. It is essentially a Christmas tree light with three filters only one of which is worth any money. The orange interference filter. They can be bought these days on ebay for $20 or $30 .

http://cgi.ebay.com/Optical-Filter-590D ... 518e4b5608

http://cgi.ebay.com/Optical-Filter-588D ... 2303e69c1d

http://cgi.ebay.com/Optical-Interferenc ... 483cf0eded


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 Post subject: Re: GIA Utility Lamp
PostPosted: Sun Jan 30, 2011 6:28 pm 
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Can I just buy the filter and put it on a MAGlite?


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 Post subject: Re: GIA Utility Lamp
PostPosted: Mon Jan 31, 2011 12:36 am 
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Yes or even a Yellow LED flashlight.


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