First, let me welcome you to the forum
Now, as to your Nano Cube. I'm not sure if you're just letting us know your setup or if you want help or suggestions with it.
If you're read the stickies, you'll have noted that it is recommended that you have 10 gallons of water for each inch of shell length. You said you have hatchlings.. I'm not sure if that's 2 or more, but either way, the tank is already too small for your turtles. How deep is your water?
As to the lights. I did a bit of research on the lights you mentioned and neither of them are UVBs bulbs. Full spectrum does not mean UVB.
How close are the lights to the basking area? It seems the temperature is good for the basking area but you really need a UVB bulb.