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2nd half of personal message. Light should be about 15 inches to 18 inches above substrate. Some may disagree with me but I've seen the change in my own pyramided tortoise. I would hate to see your beautiful babies look anything but perfect and would love to have some of these one day as well.
Right kind of lights but too small. I use 4 foot fixture with 2 lights. UVB 5 or UVB 10. I give about 12 hours a day. This works for my Redfoots. Have tried 2 and 3 foot and did not give enough surface radiating area or intensity or light and still pyramided. If the fixture has a reflector less of your expensive lights will go to waste.