"For the Megarays it is definitely 12 for the 100watt and 14 for the 160"

Actually...the Mega-Ray website does not support this statement.

The website explains that the distance will be somewhat dependent on the animal. The website recommends 10-18" for the 100 and 12-20" for the 160 so it appears that the minimum numbers suggested by the manufacturer are 10" for the 100 and 12” for the 160. With that said, I still highly recommend that a uvb meter be used to verify levels when playing with any minimum recommendation.

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