How big of a lamp should I get?

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Oxalis

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I'm getting an Exo Terra UVB mercury vapor bulb, 125 W. How big of a dome lamp should I get for this bulb? I see an 8.5'' one that says it works up to 150 W. Is this too big? Should I go with the smaller 5.5''?

I'm in the process of building a tortoise table for my Russian. The area is 16 sq ft. I'll be attaching my lamps to something that allows me to move them to adjust the temperature.

Thanks! :tort:
 

mikeh

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8.5". These bulbs put out good amount of heat. Larger dome will diffuse it evenly.

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Yvonne G

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I never use anything smaller than a 10" dome for my MVB. They get very hot and you shorten the life of the bulb if you allow it to overheat. I use 10" and 12" domes, whichever I can find.
 
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