The right-side render looks nice.  Whenever I render lighting using the Superfly engine, I convert it to blackbody lights by attaching the Blackbody node to the Color channel of the Light node. Adjusting the temperature of the Blackbody node changes the color of the light emitted by the light source.  The lower the temperature value, the warmer the color of the emission.  The higher the temperature value, the cooler the color that is emitted.