The big brother to Filmgear's most popular portable LED Flo-Box is the 4' System. At just under 10 pounds, this unit comes ready to plug in to wall power and includes a handy dimmer knob in the line mounted on/off switch. Rugged LED tubes will provide years of service without breaking. Comes with color corrected daylight 5600 kelvin tubes. Tungsten (3200 kelvin) tubes can be purchased separately.