There is no color shift when powering the Solair up or down. A microprocessor provides consistent power output preventing Kelvin degree shifts and variances in power output that may have happened on previous Powerlights. This is a Photogenic Simone Solair 4 Monolight Kit complete with 2 different size softboxes for softening the light light stands for support up to 13' a 14 reflector with barndoors and diffuser and a background reflector for creating a glow behind portrait subjects.