Posted by:
LauraV
at Sun Dec 28 16:54:06 2003 [ Email Message ] [ Show All Posts by LauraV ]
I I don't post here that often anymore, and even though I'm probably one of the only persons who are not crazy about this bulb here on this forum, I decided to stick ,m neck out here anyway. 
I'm glad you are aware of the two sides involving the MV lamps.
Yes, they produce one heck of a lot of light and heat, in fact by the time I had to remove the MV bulb from the porcelain socket (of a 10'-12" dome), the metal screw part of the MV bulb had expanded so much due to the intense heat that is fused to the porcelain. I had to break the bulb and use needle nosed pliers to remove the screw part. This happened with all three bulbs I tried. On top of that, I have read veterinarian reports that two beardies under MV bulbs (there were only two involved using MV - a third beardie was tested who had not been on MV bulbs, so not a big study)had significant amounts of mercury built up in their tissues. Mercury is a poison. It was not discovered just what the animals died of (I wish I had saved that article), so I don't know that they died from the mercury poison, only that they had it in their tissues. So, it is not conclusive by any means, but it is for me to decide not to risk it. We have learned so much after mistakes have been made, and some mistakes aren't evident for years to come. So, I choose to stick with the old tried and true methods of delivering uvb. The tube or the coil (which fits in a normal light bulb socket). One more thing I learned first handed is that the MV bulbs will, even if only temporary, change the coloration of your dragons. They yellow them. If you see an animal unusually yellow, chances are the pic was taken of the animal under mv lamps or just removed from them.
examples:
Sandfire yellow normal:
Sandfire yellow exposed:
Red normal:
Red Exposed:
Sunburst normal:
Sunburst exposed:
RFXSF normal:
RFXSF exposed:
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Photos  
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RE: MERCURY VAPOR BULBS!!!!!.............good or bad?.....also how many beardies for this enclosure? - LauraV, Sun Dec 28 16:54:06 2003