Fluorescent lights up front, LED (light emitting diodes) and fluorescents inside.
We strive for a color temperature inside the design studio of between 3500 and 4500 Kelvin degrees. This is a mid-morning or a mid-afternoon natural light. This is accomplished with a random combination of natural light, fluorescent lights, LED lights and several white hard surfaces for scattering purposes.
It all works out. It’s magic.