Oh my! Three beautiful babies. Love them! Wow. You are lucky-lucky-lucky to have such precious jewels! : )
Oh-oh-oh ... you must remove that light bulb, super fast. That is the coil type that for some reason or another hurts their little baby eyes.
The coil light bulbs are evil for tortoises. : 0
Nice looking torts, only artificial UVB I would use would be Zoomed T5HO 10% or Arcadia T5HO 3D+ 12%. You will need a matching fixture. I would aim for the light to cover about half the enclosures length and 15"-18" of the ground.