get a digital indoor / outdoor thermometer that records high/low
you can get them at garden shops or places like target for about 17 -- 30 bucks.
MV bulbs are like heat lamps from what I have heard so I suspect the hot spot is more than 100... dpends on how good your current termomiter is....
will they move: they like strong lights, and if the only strong light is the UVB/MV bulb they will tend to stay under it.
also if your night temp IS 66 as you posted then a swing from 100 day to 66 night temps is way to much for even a healthy adult much less a sick baby....
75-79 night temp
90-105 day temp (105 MAX!!)
Day temp should have a hot end and a cool end
see that I am realy saying 78-69 night and 80-90 day as a range of temps overall thats like a 10 deg swing
not a 66 -- to -- 100 which is like a 34 deg swing!!
this may not kill them outright but could stress them to the point where other things could make them sick that they would normaly tolerate.
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