The TL-50NXT provides all the great features of the TL-50, but also adds variable color temperature and a 100w output. You can now adjust both color temperature and brightness through a multifunction dimmer on the back of the unit. The TL-50NXT also has a preset button which allows you to recall any light output position simply by holding the button for 3 seconds. The TL-50NXT also now accepts up to a 18V through its charging port, as well as offering the ability to run from a powertap.