The realism commandment goes for other values, including lights. A skylight or a sun will have vastly more power than the brightest lightbulb. Bear this in mind when setting up dome lights and fill lights such as soft boxes. If you set a realistic intensity for your sky and electric lights when lighting an interior for instance–where interior and exterior lighting work in tandem–you are far more likely to end up with a render that looks real than if you eyeball these values.
I often hear viz a