My understanding is dont use a red light. Basking wise a sulcata & russian need the same type basking area. A redfoot or other forest tortoise doesnt need that.
While we're talking about lights & heat sources just be ultra careful not to dry everything out. If you blaze a che, uv, & basking light it will be an oven. Thermostat & timers are your best friend
I'm planning to use only the UVB tubes and CHEs for heat, with the red foots and the Russian.