A good way for ambient lighting. I use an even simpler way. I use two invisible light panels. I place one 0.5 cm from the ceiling and it is oriented towards the floor with a strength of about 2. I copy the same one and place it 0.5 cm from the floor and rotate it along the x or y axis so that it is directed towards the ceiling with a strength between 1 and 2. For those lights, I create a new level at the same elevation as the first level. So I can easily turn on and off those lights that only serve to illuminate the space.